Billings, Evelyn. <br/><br/>
The Billings method :  controlling fertility without drugs or devices / 
Evelyn Billings & Ann Westmore. 
 - 1st American ed. 
 - New York :  Random House,  c1980. 
 - 254 p. :  ill. ;  22 cm. 
<br/><br/> Reprint. Originally published: Richmond, Victoria, Australia : A. O'Donovan, 1980.  Includes index. 
<br/><br/>Bibliography: p. [230]-237. 
<br/><br/><label>ISBN: </label>039452120X :  $12.95 
<br/><br/><label>LCCN: </label>81050275  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural family planning--Ovulation method.
<br/><br/><label>LC Class. No.: </label>RG 136 .5 .B53 1980  / .B53 1980 
<br/><br/><label>Dewey Class. No.: </label>613.9/434