Scientific directory 1968 and annual bibliography 1967 

 - Maryland:   US Department of Health, Education, and Welfare,   1968 
 - v, 243p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Directory
<br/><br/><label>Universal Decimal Class. No.: </label>R 061.6:61(058.7)(73)  / K8