. Early geophysical papers of the Society of Exploration Geophysicists . O 'i 3 -t 3cfffrt«n Cltj °^ ftAfu«*«T«. Sfc -:- " DO § # too 160 :"' >>â ' ?::fgp£- r. ~ito 3 ^yl â : â £\ .':'.â : ::T::::::l-^k^z'']'" â IXr:t~.-^r_-: n^ HO 1*0 60 m\W^^WM^l3^yP to 40 u to v: : ':'::â rrHHrHrri ii| / f7 /SS '60 / 581

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Keywords: ., bo, bookcentury1900, booksubjectpetroleum, booksubjectprospecting