APA Citation

UMBGROVE, J. (1971). The pulse of the earth - J.H.F. Umbgrove. Martinus Nijnof.

Chicago Style Citation

UMBGROVE, J.H.F. The Pulse of the Earth - J.H.F. Umbgrove. Martinus Nijnof, 1971.

MLA Citation

UMBGROVE, J.H.F. The Pulse of the Earth - J.H.F. Umbgrove. Martinus Nijnof, 1971.

Warning: These citations may not always be 100% accurate.