"November 1999"--P. [2] of cover.Includes bibliographical references (p. 35-40).Mode of access: Internet
"April 1999"--P. [2] of cover.Includes bibliographical references (p. vi).Mode of access: Internet
Cover title."January 1963."Includes bibliographical references.Mode of access: Internet
"August 1993."Cover title.Includes bibliographical references (p. 152-154).Interim report.Mode of ac...
"May, 1999."Cover title.Includes bibliographical references.Mode of access: Internet
Published also in the Annual report of the Board of Regents of Smithsonian Institution for 1895.Hodg...
"May 1995."Cover title.Includes bibliographical references.Mode of access: Internet
"September 2001."Cover title.Includes references to websites.Mode of access: Internet
Cover title.Includes bibliographical references (p. 27-28).Mode of access: Internet
Subject category 46."March 1981"--Cover.Bibliography: p. 124-138.Mode of access: Internet
"April 1993."Cover title.Includes bibliographical references.Interim report.Mode of access: Internet
"NSF 83-15"--p. 4 of cover.Includes bibliographical references and index.Mode of access: Internet
"February 1994"--P. [4] of cover.Cover title.Includes bibliographical references (p. 19).Mode of acc...
"August 1997.""Coordinated by: Office of Prevention, Education, and Control."Cover title.Mode of acc...
"OTA-BP-H-140"--P. [4] of cover."February 1995"--P. [4] of cover.Includes bibliographical references...
Includes bibliographical references."October 1988.""Final [report]"--Technical rept. documentation p...
"April 1999"--P. [2] of cover.Includes bibliographical references (p. vi).Mode of access: Internet
Cover title."January 1963."Includes bibliographical references.Mode of access: Internet
"August 1993."Cover title.Includes bibliographical references (p. 152-154).Interim report.Mode of ac...
"May, 1999."Cover title.Includes bibliographical references.Mode of access: Internet
Published also in the Annual report of the Board of Regents of Smithsonian Institution for 1895.Hodg...
"May 1995."Cover title.Includes bibliographical references.Mode of access: Internet
"September 2001."Cover title.Includes references to websites.Mode of access: Internet
Cover title.Includes bibliographical references (p. 27-28).Mode of access: Internet
Subject category 46."March 1981"--Cover.Bibliography: p. 124-138.Mode of access: Internet
"April 1993."Cover title.Includes bibliographical references.Interim report.Mode of access: Internet
"NSF 83-15"--p. 4 of cover.Includes bibliographical references and index.Mode of access: Internet
"February 1994"--P. [4] of cover.Cover title.Includes bibliographical references (p. 19).Mode of acc...
"August 1997.""Coordinated by: Office of Prevention, Education, and Control."Cover title.Mode of acc...
"OTA-BP-H-140"--P. [4] of cover."February 1995"--P. [4] of cover.Includes bibliographical references...
Includes bibliographical references."October 1988.""Final [report]"--Technical rept. documentation p...
"April 1999"--P. [2] of cover.Includes bibliographical references (p. vi).Mode of access: Internet
Cover title."January 1963."Includes bibliographical references.Mode of access: Internet
"August 1993."Cover title.Includes bibliographical references (p. 152-154).Interim report.Mode of ac...