Natural family planning — Calendar method

A panel discussion in the KPFA studio regarding population and birth control, moderated by Elsa Knight Thompson, with Father Eugene Boyle, KPFA commentator; Father Anthony Zimmerman, Society of the Divine Word, Sacrae Theologiae Doctor, author of “Overpopulation”; and Dr. Harold A. Harper, Professor of Biochemistry, U. C. Medical Center in San Francisco, Faculty of the…