Potter, Robert G. <br/><br/>
Length of the fertile period 
Robert G. Potter, Jr. 
 - [New York  Milbank Memorial Fund  1961?] 
 - 31 p.  ill.  23 cm. 
<br/><br/> Caption title.  "Reprinted from The Milbank Memorial Fund quarterly, January 1961, vol. XXXIX, no. 1, pp. 132-162." 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Menstrual cycle.--Mathematical models.<br/>Fertility, Human--Mathematical models.