000 00671nam a2200205Ia 4500
008 170503s9999||||xx |||||||||||||| ||und||
080 _a55
100 1 _aSCHOPF, James M.
245 0 _aField description and sampling of coal beds /
_cby James M. Schopf.
260 _aWashington :
_bUnited States Government Printing Office,
_c1960
300 _aP. 25-70 p., [14] h. de lam. --
336 _2isbdcontent
_aTexto (visual)
337 _2isbdmedia
_3Impreso
_asin mediación
490 _aGeological Survey Bulletin
490 _v 1111-B
650 _aGeología
942 _2cdu
942 _cBK
999 _c21366
_d21366