000 00310nam a2200133Ia 4500
008 240531s9999 xx 000 0 und d
020 _aNULL
082 _a526 9823 KIL
100 _aKilford, W. K
245 0 _aElementary air surveying 1980
260 _aE. L. B. S
_b1963
650 _aNULL
942 _cANF
999 _c315432
_d315432