Forsythe, William Elmer  1881 <br/><br/>
Measurement of radiant energy 

 - London :   McGraw-Hill,   1937. 
 - xiv, 452 p. :   il. ;   22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RADIACION
<br/><br/><label>Universal Decimal Class. No.: </label>539.12