TY  - BOOK
AU  - Li Zhengxin
AU  - Zhengxin,Li
TI  - New determination of the Earth  rotation  psrs,eters from  optical astrometry   observation,1962.0-1092.o
U1  - B612Z76f1602 
PY  - 1986///
CY  - Bejing
PB  - Observatory
KW  - Astronomy
KW  - Earth
KW  - Earth rotation Parameters
ER  -