International Planned Parenthood Federation.
Johann Friedrich Wilhelm Seegert
Mahmood Shafi
Louis Deroubaix
Félix Bernard
Felix Wirtz
Isaak Strauss
E. Nieppe
Fritz Weisswange
Benson J. Horowitz
Carl Mandt
Jean Baptiste Blatin
Am©♭d©♭e Deville
Clifton E. Wing
Alfred Dührssen
Unknown Author
Laman A. Gray
National Institute of Child Health and Human Development (U.S.)
Michael F Rein
Joachim Kümmel