(Q27710681)
Statements
June 1974
1 reference
Population reports. Series I, Periodic abstinence (English)
2 references
1 reference
1 reference
unknown value
Population Information Program, the Johns Hopkins University
1 reference
Baltimore, Md.
1 reference
613
1 reference
September 1981
1 reference
Identifiers
Population report. Series I, Periodic abstinence (English ed.)
1 reference
1 reference
1 reference
20 October 2021
2 references