000 00545nam a22001097a 4500
008 250306s2000 us ||||| |||| 00| 0 eng d
020 _a0607895543 (pbk.)
100 _aTysdal, Russell G.
_9318057
245 _aRevision of Middle Proterozic Yellowjacket Formation, central Idaho, and Revision of Cretaceous Slim Sam Formation, Elkhorn Mountains area, Montana /
_cby R. G. Tysdal.
264 _aWashington, D. C. :
_bU. S. G. P. O. ;
_aDenver, CO :
_bFor sale by U.S. Geological Survey, Information Services
_c2000.
653 _aგეოლოგია
999 _c811240
_d811238