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024 _a48600
037 _cTextual
040 _aCSL
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_cCSL
041 _aeng
082 _aH7, M1-;1
100 _aTownshend J R G
245 0 _aTerrain analysis and remote sensing
260 _c1981
300 _ap.
_ccm.
650 _aGeology
942 _hH7, M1-;1
_cTEXL
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999 _c85541
_d85541