Postglacial vegetational history of the Great Plains. - Washington, D.C.

von Wells, Philip V.
Veröffentlicht in Science ; 167.1970, no. 3925, S. 1574-1582 : 2 Ill. ; 3 Tab.
1970.

Late pleistocene vegetation and degree of pluvial climate change in the Chihuahuan Desert. - Washington, D.C.

von Wells, Philip V.
Veröffentlicht in Science ; 153.1966, no. 3739, S. 970-974 : 2 Ill. ; 1 Tab.
1966.