Subject: Certificates (84 items)
March 1, 1945
December 3, 1945
December 10, 1945
November 24, 1947
January 14, 1950
April 17, 1953
January 31, 1955
May 6, 1955
June 4, 1955
June 6, 1956
June 30, 1957
August 28, 1957
April 19, 1958
June 20, 1958
September 6 - 13, 1958
April 1960
May 17, 1960
September 9, 1960
November 1, 1962
January 1, 1963
August 24, 1963
December 29, 1963
December 27, 1964
June 16, 1965
1965
October 9, 1967
October 20, 1968
November 10, 1969
November 11, 1969
March 6, 1972
April 8, 1972
June 6, 1975
February 20, 1976
March 5, 1976
December 21, 1976
1976
1976
February 2, 1977
August 13, 1977
March 30, 1978
May 17, 1978
October 1978
April 4, 1979
June 30, 1979
1970s
1970s
April 9, 1980
May 31, 1980
June 9, 1980
September 10, 1980
February 23, 1981
February 26, 1981
April 7, 1981
January 16, 1982
March 1, 1982
March - June, 1982
May 7, 1982
May 13, 1982
1982
May 1, 1983
May 8, 1983
June 23, 1983
June 19, 1985
1985
March 11, 1986
June 3, 1986
January 27, 1987
February 28, 1987
May 16, 1987
April 28, 1988
November 28, 1989
1989
1980s
1980s
1980s
May 4, 1990
March 6, 1991
May 26, 1993
May 29, 1993
September 28, 1993
November 8, 1993
August 23, 1994
October 10, 1994
January 10, 2001