Aug. 1968
June 16, 1963
Jun. 1962
[between 1969 and 1973]
1968
[ca. 1969]
[1962?], with revisions to 1966
[ca. 1960]
1969
1969
1969
1969
Mar. 1969
Mar. 1969
[1968?]
[between 1968 and 1973]
Aug. 1967
1967
1967
[1969?]
[1969?]
Aug. 1968
[between 1969 and 1973]
Feb. 1969
Nov. 1968
[1968 or 1969]
[1968 or 1969]
1969
[between 1968 and 1973]
[between 1968 and 1973]
1968
Sept. 1968
Sept. 29, 1962
Mar. 8, 1960-June 21, 1962
Jan. 3, 1961
[1962?], with revisions to Dec. 1965
1969
[1962?], with revisions to Jan. 1967
1968-1969
1968
1968
1969
1969
[ca. 1969]
[ca. 1969]
1968
1968
[ca. 1969]
[ca. 1969]
[ca. 1969]