000 00951cam a22003011 4500
001 gs 61000031
003 DLC
005 20260227111410.0
008 720222s1959 xx 000 0 eng
010 _ags 61000031
035 _a(OCoLC)245741
040 _aDLC
_cOAkU
_dDLC
042 _apremarc
050 0 0 _aQE185
_b.A43 no. 54
110 2 _aGeological Survey of Canada
245 1 0 _aHelicopter operations of the Geological Survey of Canada.
260 _a[Ottawa]
_bDept. of Mines and Technical Survey, Canada
_c[1959]
300 _axi, 60 p.
_billus., maps, diagrs., tables.
490 1 _aIts Bulletin
_v54
500 _aAbstract in English and French.
504 _aIncludes bibliographies.
650 0 _aHelicopters.
650 0 _aGeology
_xFieldwork.
650 0 _aGeology
_zCanada
_vMaps.
650 0 _aPhotographic surveying.
650 0 _aGeology
_zCanada
_xSurveys.
830 0 _aBulletin (Geological Survey of Canada) ;
_v54.
999 _c29511
_d29511