00861cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035001900092040005500111050002800166100004400194245006300238260003000301300007600331490009000407502004200497500006300539650004100602gs 06001227 DLC20260227111305.0811015r1899uuuunyuabf        000 0 eng c  ags 06001227   a(OCoLC)7850725  aLibrary, U.S. Geol. surveycNBuUdNBuUdOCoLCdDLC00aQE1b.C7 vol. 9, no. 651 aIrving, J. D.q(John Duer),d1874-1918.02aA contribution to the geology of the northern Black Hills.  a[New York]b[s.n.]c1899.  a1 p. leaf, 187-340 p.billus., plates (partly fold.) fold. map.c25 cm.0 aContributions from the Geological department of Columbia university.vvol. IX, no. 65  aThesis (PH. D.)--Columbia university.  aFrom Annals New York academy of sciences, vol. XII, no. 9. 0aGeologyzBlack Hills (S.D. and Wyo.)