Quarterly bulletin of the Canadian Engineering Standards Association . 

 - Ottawa :    National Research Building,    1938- 
 - v. ;    23cm. 
 - Quarterly. 
<br/><br/>  Latest issue consulted: Vol. 34, no. 4 (Jan. 1961) 
 = E.S.A 
<br/><br/><label>Dewey Class. No.: </label>620.6271