Title from Web page (viewed on March 2, 2011). Includes bibliographical references and index.
Contents:
v.I. A-C -- v.II. D-H -- v.III. I-P -- v.IV. R-Z.
Summary:
A four volume encyclopedia set that includes more than 750 articles covering every significant issue, event, law, and figure in U.S. environmental history.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.