Trobisch, Ingrid Hult. An experience of love : : understanding natural family planning / [electronic resource] / Ingrid Trobisch and Elisabeth Roetzer.. — Old Tappan, N.J. : : F.H. Revell Co.,, c1981.. — 160 p. : : ill. ; 22 cm. Translation of: Mit Freuden Frau sein 2. ISBN: 080071184X 9780800711849 LCCN: 81008651 Subjects--Topical Terms: Natural family planning. LC Class. No.: RG136.5 / .T7613 Dewey Class. No.: 613.9/434