Natural sines and cosines to eight decimal places. 

 - Washington,  U.S. Govt. Print. Off.,  1942. 
 - 541 p. of tables.  28 cm. 
 - Its Special publication  no. 231 .
 - Special publication (U.S. Coast and Geodetic Survey) ;  no. 231. .
<br/><br/> At head of title: U.S. Dept. of Commerce, Jesse H. Jones, secretary. Coast and Geodetic Survey, Leo Otis Colbert, director ... 
<br/><br/>H.B 
<br/><br/><label>LCCN: </label>42038227  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Trigonometry--Tables.
<br/><br/><label>LC Class. No.: </label>QA55  / .U576 1942 
<br/><br/><label>Dewey Class. No.: </label>510 USA