n.p. Adults Educational League, 1935. Pamphlet. Single long sheet folded to make 8-panel brochure, 4.75x6 inches, very good. Four charts show schedules varying by woman's menstrual cycle. OCLC lists only two holdings (one dated 1939 at UCDavis and an undated one at "The Strong") as of 11/2016.
Introduction explains need for birth control and origins of Dr. Ogino's method from Japan.