CORRELATION OF MONTANA ALGONKIAN FORMATIONS. STATE OF MONTANA BUREAU OF MINES AND GEOLOGY, Reprint 1. From Vol. 42, pp673-696 of the Bulletin of the GSA
Clapp, C.H. & C.F. Diess
Butte,MT: Montana School of Mines, pp673-695 + folding maps Very good (Item ID: 1223)
$12.50

