Ecoregions map of North America : explanatory note /

"Lambert azimuthal equal area"--Map.

Bark beetles of the genus Hylastes erichson in North America /

Includes index.

Taxonomy of Acrobasis larvae and pupae in Eastern North America (Lepidoptera : Pyralidae) /

Mode of access: Internet.

Host records for Lepidoptera reared in Eastern North America /

Includes bibliographical references (p. 45-49).

The fleas of North America : classification, identification, and geographic distribution of these injurious and disease-spreading insects /

Contribution from Bureau of Entomology and Plant Quarantine.

United States of America before the National Labor Relations Board, Case C-142 : in the matter of United States Steel Corporation (a New Jersey Corporation), Carnegie-Illinois Steel Corporation (a New Jersey Corporation) and Steel Workers Organizing Committee and Amalgamated Association of Iron, Steel and Tin Workers of North America.

"Exihibit B. Plans of employmee representation in effect at the plants of respondent, Carnegie-Illinois Steel Corporation"--Cover.

Section Tuberarium of the genus Solanum of North America and Central America.

Bibliography: p. 236-238.

A revision of the species of Monopsyllus Kolenati in North America (Siphonaptera, ceratophyllidae) /

Includes index.

Silvics of North America /

G.P.O. sales statement incorrect in publication.

Memoir, historical and political, on the northwest coast of North America, and the adjacent territories : illustrated by a map and a geographical view of those countries.

References: Howes, U.S.IANA, no. G.389.

Proceedings : Symposium on Sustainable Management of Hemlock Ecosystems in Eastern North America, June 22-24, 1999, Durham, New Hampshire /

Includes bibliographical references.

Synoptical flora of North America /

Vol. I. pt. II. Caprifollaceæ to Compositæ first published in 1884; vol. II. pt. I, Gamopetalæ after Composilæ, in 1878.

Grasses of North America /

Includes bibliographical references.

Tuberales of North America /

Bibliography: pages 52-53.