Stratigraphic sections of the Phosphoria formation in Idaho, 1947-48, part 2 [unknown]

V.E. McKelvey, F.C. Armstrong, R.A. Gulbrandsen, R.M. Campbell
1953 Circular   unpublished
doi:10.3133/cir301 fatcat:sl33wxzlovbzflobt2odjpg4ii