Periodicals currently received as of 30 september 1971 
/ Engineering societies library 
 - New York:     Engineering societies library,    1971 
 - 192p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>science
<br/><br/><label>Universal Decimal Class. No.: </label>R 017.42:62:(747)  / L1