International physics & astronomy directory  1969-70 

 - New York  W. A. Benjamin  1969 
 - 802 p. ; 23 cm. 
<br/><br/><label>ISBN: </label>2805303774 
<br/><br/><label>LCCN: </label>73-099508 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics--Directories<br/>Astronomy--Directories