University of Guyana Library

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Humphrey, W. A., 1876-

The geology of the country South of Piet Retief : an explanation of sheet no. 68 (Piet Retief) / W. A. Humphrey and L. J. Krige. - Prétoria, South Africa : The Government printer, 1931. - 72 p. : ill.

Bibliography : p. 67.

Subjects--Topical Terms:
Geology--South Africa.

LC Class. No.: QE325 / H86