Kopal, Zdenek,  1914-1993 <br/><br/>
An application of the method of least squares to the adjustment of photometric elements of eclipsing binaries / 
Zdenek Kopal. 
 - U.S.A. :  American Philosophical Society,  1943. 
 - 343 - 350 p. ;  26 cm. 
<br/><br/> Harvard reprint series II-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Eclipsing binaries
<br/><br/><label>LC Class. No.: </label>SPE-B 06113