PTB Testing memorandum 
/ Ministry of Technology 
 - Germany:    Ministry of Technology,    1969 
 - 117p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Subjects--Index Terms: </label>Energy resources  
<br/><br/><label>Universal Decimal Class. No.: </label>621.313-596  / K9