Robert, Hastings S. <br/><br/>
Window design strategies to conserve energy   
by Hastings S. Robert and Richard W. Crenshaw. 
 - Washington  NBS US Dept. of Commerce  1977 
 - Sectional 
 - NBS building science series 104 .
<br/><br/><label>Dewey Class. No.: </label>729.38  / N77