Nature's own birth control / / by Dr. H.J. Gerster.

MLA

Gerster, H.J. Nature's Own Birth Control. London: Wales Publishing Co, 1949.

APA

Gerster, H. (1949). Nature's own birth control. London: Wales Publishing Co.

Chicago

Gerster, H.J. Nature's Own Birth Control. London: Wales Publishing Co, 1949.