Volume IV 1
101001 - 106324 January 23, 1961 - June 30, 1961, January 23, 1961, June 30, 1961
Volume IV 2
107001 - 112148 July 3, 1961 - December 27, 1961, July 3, 1961, December 27, 1961
Volume IV 3
201001 - 206296 January 2, 1962 - June 28, 1962, January 2, 1962, June 28, 1962
Volume IV 4
207001 - 210008 July 3, 1962 - October 1, 1962, July 3, 1962, October 1, 1962
Volume IV 5
210009 - 210136
Volume IV 5
2X1 - 2X1024 October 2, 1962 - December 26, 1962, October 2, 1962, December 26, 1962
Volume IV 6
3X0001 - 3X1990 January 1, 1963 - June 28, 1963, January 1, 1963, June 28, 1963
Volume IV 7
3X1991 - 3X3773 July 1, 1963 - December 31, 1963, July 1, 1963, December 31, 1963
Volume IV 8
4X0001 - 4X2147 January 1, 1964 - April 30, 1964, January 1, 1964, April 30, 1964
Volume IV 9
4X2148 - 4X4196 May 1, 1964 - December 29, 1964, May 1, 1964, December 29, 1964
Volume IV 10
59501M - 59948P: June 19, 1964 - October 6, 1969, June 19, 1964, October 6, 1969
Volume IV 11
5X001 - 5X1000 Jan 7, 1965 - March 23, 1965, 1965, March 23, 1965
Volume IV 12
5X1001 - 5X2208 March 23, 1965 - June 30, 1965, March 23, 1965, June 30, 1965
Volume IV 13
5X2209 - 5X3136 July 1, 1965 - September 30, 1965, July 1, 1965, September 30, 1965
Volume IV 14
5X3137 - 5X3971 October 1, 1965 - December 31, 1965, October 1, 1965, December 31, 1965
Volume IV 15
6X0001 - 6X0132
Volume IV 15
6X0173 - 6X1295 January 1, 1966 - March 31, 1966, January 1, 1966, March 31, 1966
Volume IV 16
6X1296 - 6X2573 April 1, 1966 - June 30, 1966, April 1, 1966, June 30, 1966
Volume IV 17
6X2574 - 6X3635 July 1, 1966 - September 30, 1966, July 1, 1966, September 30, 1966
Volume IV 18
6X3636 - 6X4563 October 31, 1966 - December 31, 1966, October 31, 1966, December 31, 1966
Volume IV 19
7X0001 - 7X1117 January 5, 1967 - April 14,1967, January 5, 1967
Volume IV 20
7X1118 - 7X2274 April 17, 1967 - June 22, 1967, April 17, 1967, June 22, 1967
Volume IV 21
7X2275 - 7X3394 June 23, 1967 - January 3, 1968, June 23, 1967, January 3, 1968
Volume IV 22
8X0001 - 8X1499 January 15, 1968 - August 2, 1968, January 15, 1968, August 2, 1968
Volume IV 23
8X1500 - 8X2799 August 2, 1968 - December 27, 1968, August 2, 1968, December 27, 1968
Volume IV 24
9X0001 - 9X1000 January 10, 1969 - June 25, 1969, January 10, 1969, June 25, 1969
Volume IV 25
9X1001 - 9X1632 July 7, 1969 - March 31, 1970, July 7, 1969, March 31, 1970
Volume IV 25
70X10001 - 70X1000
Volume IV 26
70X1001 - 70X2000 April 1, 1970 - July 14, 1970, April 1, 1970, July 14, 1970
Volume IV 27
70X2001 - 70X4000 July 14, 1970 - December 30, 1970, July 14, 1970, December 30, 1970
Volume IV 28
1X0001 - 1X1500 January 6, 1971 - June 9, 1971, January 6, 1971, June 9, 1971
Volume IV 29
1X1501 - 1X2572 June 9, 1971 - December 29, 1971, June 9, 1971, December 29, 1971
Volume IV 30
2X0001 - 2X2036 January 5, 1972 - December 20, 1972, January 5, 1972, December 20, 1972
Volume IV 31
3X0001 - 3X2248 January 5, 1973 - December 28, 1973, January 5, 1973, December 28, 1973
Volume IV 32
4X0001 - 4X1500 January 8, 1974 - July 19, 1974, January 8, 1974, July 19, 1974
Volume IV 33
4X1501 - 4X2976 July 19, 1974 - December 31, 1974, July 19, 1974, December 31, 1974
Volume IV 34
5X0001 - 5X1500 January 2, 1975 - October 31, 1975, January 2, 1975, October 31, 1975
Volume IV 35
5X1501 - 5X2840 November 3, 1975 - December 23, 1975, November 3, 1975, December 23, 1975
Volume IV 36
6X0001 - 6X1532 January 5, 1976 - June 15, 1976, January 5, 1976, June 15, 1976
Volume IV 37
6X1533 - 6X2936 June 15, 1976 - December 23, 1976, June 15, 1976, December 23, 1976
Volume IV 38
7X0001 - 7X0844 January 6, 1977 - May 31, 1977, January 6, 1977, May 31, 1977
Volume IV 39
7X0845 - 7X1972 June 1, 1977 - December 22, 1977, June 1, 1977, December 22, 1977
Volume IV 40
8X0001 - 8X1100 January 17, 1978 - June 13, 1978, January 17, 1978, June 13, 1978
Volume IV 41
8X1101 - 8X2201 June 13, 1978 - December 22, 1978 [serials acquisitions], June 13, 1978, December 22, 1978
Volume IV 42
9X0001 - 9X1020 January 9, 1979 - December 19, 1979, January 9, 1979, December 19, 1979
Volume IV 43
80X0001 - 80X0833 January 16, 1980 - December 31, 1980, January 16, 1980, December 31, 1980
Volume IV 44
1X0001 - 1X0712 January 12, 1981 - December 23, 1981, January 12, 1981, December 23, 1981
Volume IV 45
2X0001 - 2X0684 January 5, 1982 - December 23, 1982, January 5, 1982, December 23, 1982
Volume IV 46
3X0001 - 3X0360 January 15, 1983 - May 26, 1983, January 15, 1983, May 26, 1983