North America geology for 1906-1907 /
Weeks, F.B.
North America geology for 1906-1907 / F.B. Weeks - [S.l.] : Government Printing Office, 1909. - 1 v.
North America geology for 1906-1907 / F.B. Weeks - [S.l.] : Government Printing Office, 1909. - 1 v.