McCarthy, John J. <br/><br/>
Fertility awareness :  an instructional program with charts and text / 
John McCarthy, Mary C. Martin. 
 - Washington, DC :  The Human life and Natural family planning foundation,  1982. 
 - iv, 29 p. :  ill. ;  23 cm. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertility, Human--Study and teaching.