The ancient forests of Oregon

Gerald W. Williams Collectio

Pleistocene flora from Alaska

17 p. : ill. ; 24 cm.Includes bibliographical references

Hackberry seeds from the Pleistocene loess of northern China. American Museum novitates ; no.283

2 p. : ill. ; 23 cm.Includes bibliographical references

A new poplar (Populus pilosa) from the eastern Altai Mountains. American Museum novitates ; no.292

8 p. : ill. ; 23 cm

New light on the giant fossil may-flies of Mongolia. American Museum novitates ; no. 244

4 p. : ill. ; 23 cm.Includes bibliographical references