International photovoltaic conference of Washington :  1927 delegation of the United States of America committee on tariffs word count and accounting / 
Conference International photovoltaic was held on 1927 in Washington 
 - Washington, D. C. :  United States Government Printing Office,  1928 
 - 80 p. ;  21 cm. 
<br/><br/> Report on the history of use of codes and code language, the international telegraph regulations pertaining theretoand the bearing of this history on the cortina report by William F. Friedman 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photovoltaic power generation<br/>Solar cells<br/>Photovoltaic cells
<br/><br/><label>Dewey Class. No.: </label>621.31244