WADSWORTH,M.E., Notes on the Geology. Cambridge 1880.

WADSWORTH, M. E.,

Notes on the Geology of the Iron and Copper Districts of Lake Superior. Cambridge, Museum of Comparative Zoölogy, 1880.

8vo. 157 S. Originale Broschur. (Bulletin of the Museum of Comparative Zoölogy, at Harvard College. Whole Series, Vol. VII, Geological Series, Vol. I.).