TY  - BOOK
ED  - United States.
ED  - United States.
ED  - National Geodetic Survey (U.S.)
TI  - North American datum of 1983: map data conservation tables
U1  - 526.1097 
PY  - 1989///
CY  - Rockville, MD
PB  - National Geodetic Survey, Charting and Geodetic Services, National Ocean Service
KW  - Geodesy
KW  - North America
N1  - December 1989
ER  -