Descripción
Notas:"Support for this study was provided by the U.S. Dept. of Energy, under Grants No. DE-FC01-94EW54069 and DE-FC01-99EW59049"--Title page verso.
Descripción Física:1 online resource (xiii, 164 pages) : illustrations, map
Bibliografía:Includes bibliographical references.
ISBN:0309501679
9780309501675
0309171644
9780309171649