000 00660cab a2200229 4500
001 A44
008 090401t1991 xxu||||| |||| 00| 0 eng d
035 _a(Sirsi) u31899
041 _aeng
100 _aHeister, H.
245 _aGPS 3D point positioning: the height problem, different approaches and numerical results
260 _c1991
350 _a0
490 _aSouth African Journal of Surveying and Mapping
_v21(3) December 1991, 129-134(6)
650 _aGLOBAL POSITIONING SYSTEMS
650 _aPRECISE HEIGHT TRANSFER
690 _aLAND SURVEYING
700 _aKrack, K.
700 _aSchodlbauer, A.
942 _n0
948 _c04/03/1997
999 _c21405
_d21405