Form precedes t.p."June 1985.""First printed July 1982 as FWS/OBS-82/10.21"--T.p. verso.Includes bibliographical references (p. 19-23).Mode of access: Internet
"FWS/OBS-82/10.74.""September 1984."Includes bibliographical references (p. 13-15).Mode of access: I...
"FWS/OBS-82/10.51.""September 1983."Includes bibliographical references (p. 13-15).Mode of access: I...
Form precedes t.p."May 1985."Distributed to depository libraries in microfiche.Includes bibliographi...
"September 1985."Form precedes t.p.Includes bibliographical references (p. 32-36).Mode of access: In...
Form precedes t.p."July 1985."Includes bibliographical references (p. 19-23).Mode of access: Interne...
Form precedes t.p."July 1986."Includes bibliographical references (p. 21-25).Mode of access: Interne...
Form precedes t.p."August 1985."Includes bibliographical references (p. 30-33).Mode of access: Inter...
Form precedes t.p."May 1986."Includes bibliographical references (p. 14-16).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 20).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 28-32).Mode of access: Inter...
Form precedes t.p."May 1985."Includes bibliographical references (p. 15-18).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 18-21).Mode of access: Inter...
Form precedes t.p."August 1985."Includes bibliographical references (p. 24-29).Mode of access: Inter...
"FWS/OBS-82/10.53.""September 1983."Includes bibliographical references (p. 13-14).Mode of access: I...
"FWS/OBS-82/10.1.""February 1982."Includes bibliographical references (p. 23-29).Mode of access: Int...
"FWS/OBS-82/10.74.""September 1984."Includes bibliographical references (p. 13-15).Mode of access: I...
"FWS/OBS-82/10.51.""September 1983."Includes bibliographical references (p. 13-15).Mode of access: I...
Form precedes t.p."May 1985."Distributed to depository libraries in microfiche.Includes bibliographi...
"September 1985."Form precedes t.p.Includes bibliographical references (p. 32-36).Mode of access: In...
Form precedes t.p."July 1985."Includes bibliographical references (p. 19-23).Mode of access: Interne...
Form precedes t.p."July 1986."Includes bibliographical references (p. 21-25).Mode of access: Interne...
Form precedes t.p."August 1985."Includes bibliographical references (p. 30-33).Mode of access: Inter...
Form precedes t.p."May 1986."Includes bibliographical references (p. 14-16).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 20).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 28-32).Mode of access: Inter...
Form precedes t.p."May 1985."Includes bibliographical references (p. 15-18).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 18-21).Mode of access: Inter...
Form precedes t.p."August 1985."Includes bibliographical references (p. 24-29).Mode of access: Inter...
"FWS/OBS-82/10.53.""September 1983."Includes bibliographical references (p. 13-14).Mode of access: I...
"FWS/OBS-82/10.1.""February 1982."Includes bibliographical references (p. 23-29).Mode of access: Int...
"FWS/OBS-82/10.74.""September 1984."Includes bibliographical references (p. 13-15).Mode of access: I...
"FWS/OBS-82/10.51.""September 1983."Includes bibliographical references (p. 13-15).Mode of access: I...
Form precedes t.p."May 1985."Distributed to depository libraries in microfiche.Includes bibliographi...