Marriage and alternatives :  exploring intimate relationships / 
Edited by Roger W. Libby and Robert N. Whitehurst. 
 - Foresman, Glenview, Ill :  Scott,  1977. 
 - 412 p. :  ill ;  24 cm. 
<br/><br/>Bibliography : p. 397-412. 
<br/><br/><label>ISBN: </label>067315050X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marriage.<br/>Unmarried couples.<br/>Sex customs.<br/>Group sex.