Ciba foundation symposium.  [proceedings] /  Preimplantation stages of pregnancy : 
 Preimplantation stages of pregnancy 
edited by G.E.W. Wolstenholme and Maeve O'Connor. 
 - London :  J. & A. Churchill,  1965. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pregnancy -- Congresses.--Pregnancy -- Congresses.