CLARK L.D, . (1983). PLANE AND GEODETIC SURVEYING VOL 1. NULL: C.B.S.
CLARK L.D, . 1983. PLANE AND GEODETIC SURVEYING VOL 1. NULL: C.B.S.
CLARK L.D, . PLANE AND GEODETIC SURVEYING VOL 1. NULL: C.B.S. 1983.