Maintaining the product protrolio: the commerical development concept 
by American Management Association, U.S.A. 
 - New York  American Management Association  1960 
 - 87p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>New products<br/>Marketing
<br/><br/><label>Dewey Class. No.: </label>T254 Am35m