TY  - BOOK
N2  - An analysis of the results of a representative sample of earlier Zeiss Ni 1 levelings suggests that a number of these earlier levelings were free of any significant magnetic error.
AB  - An analysis of the results of a representative sample of earlier Zeiss Ni 1 levelings suggests that a number of these earlier levelings were free of any significant magnetic error.
T1  - The selective salvation of Zeiss Ni 1 levelings /
DA  - 1994.
CY  - Menlo Park, Calif. :
AU  - Castle, Robert O.
AU  - Gilmore, Thomas D.
VL  - 94-698
CN  - I 19.76:
PB  - U.S. Geological Survey,
PP  - Menlo Park, Calif. :
PY  - 1994.
N1  - Cover title.
N1  - "USGS-OFR-94-698"
ID  - 219692
KW  - Geodesy
KW  - Leveling
TI  - The selective salvation of Zeiss Ni 1 levelings /
ER  -