Publication.

Mode of access: Internet.

The Permian of Mongolia;

Mode of access: Internet.

Publication.

GeoRef

[A record of lectures and addresses delivered ... before the ... Society ... /

Imperfect copy; title page wanting. Title supplied from the British Museum of Natural History Library Catalogue.

Agate : physical properties and origin /

Mode of access: Internet.

Culture & ethnology,

First published 1917. "Reprinted March, 1929 by permission of Horace Liveright."

Report.

"Catalogue of the Library of the Illinois State Museum of Natural History": Report for 1909/10, pt. II (p. 52-445.).

Popular series:

Mode of access: Internet.

Report.

Report year ends Dec. 31.

Geology leaflet.

Mode of access: Internet.

Field guide to New England turtles,

New England Museum of Natural History. Natural history guides, no. 2.

Shearwaters

"Anchor books."

Birds from the Yucatan peninsula,

Caption title.

Annual report /

GeoRef

Botanical series.

Mode of access: Internet.