Mathematische Einführung in die Gravitationstheorie Einsteins; nebst einer exakten Darstellung ihrer wichtigsten Ergebnisse Q Science
… Key to the upper Devonian of southern New York; designed for teachers and students in secondary schools Q Science
Guidebook of the western United States : Part B. The Overland route; with a side trip to Yellowstone Park Q Science
Geology of the Owl Creek mountains, with notes on resources of adjoining regions in the ceded portion of the Shoshone Indian reservation, Wyoming Q Science
The trend of the race; a study of present tendencies in the biological development of civilized mankind Q Science
