Li Zhengxin <br/><br/>
New determination of the Earth  rotation  psrs,eters from  optical astrometry   observation,1962.0-1092.o 
Li Zhengxin 
 - Bejing  Observatory  1986 
 - 152 p. tab. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--Earth
<br/><br/><label>Subjects--Index Terms: </label>Earth rotation Parameters 
<br/><br/><label>Dewey Class. No.: </label>B612Z76f1602