DEPARTMENT OF THE INTERIOR UNITED STATES GEOLOGICAL SURVEY GEORGE OTIS SMITH, DIRECTOR. BULLETIN 431-A. ADVANCE CHAPTER FROM CONTRIBUTIONS TO ECONOMIC GEOLOGY (SHORT PAPERS AND PRELIMINARY REPORTS) 1909. PART II.-MINERAL FUELS. PETROLEUM AND NATURAL GAS.

Washington: Government Printing Office, 1910. 83, [1 blank] pp, 3 folding maps, 1 illustration, original printed wrappers. Light tanning. Very Good. Item #16898

Price: $40.00