Application of results of research 

 - London:   Butterworths Scientific Publications,   1954 
 - vii, 212p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research
<br/><br/><label>Subjects--Index Terms: </label>Conventional methods 
<br/><br/><label>Universal Decimal Class. No.: </label>5.001.5  / J4