"August 1985."Includes bibliographical references (p. 19-23).Mode of access: Internet
Form precedes t.p."August 1985."Includes bibliographical references (p. 24-29).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. 28-32).Mode of access: Inter...
"May 1985."Includes bibliographical references (p. 15-20).Mode of access: Internet
"November 1985."Includes bibliographical references (p. 15-17).Mode of access: Internet
"June 1987."Includes bibliographical references (p. 16-18).Mode of access: Internet
"June 1987."Includes bibliographical references (p. 12-13).Mode of access: Internet
"September 1987."Includes bibliographical references (p. 15-17).Mode of access: Internet
"FWS/OBS-82/10.53.""September 1983."Includes bibliographical references (p. 13-14).Mode of access: I...
"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."July 1985."Includes bibliographical references (p. 19-23).Mode of access: Interne...
"September 1985."Form precedes t.p.Includes bibliographical references (p. 32-36).Mode of access: In...
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. 18-21).Mode of access: Inter...
Form precedes t.p."August 1985."Includes bibliographical references (p. 24-29).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. 28-32).Mode of access: Inter...
"May 1985."Includes bibliographical references (p. 15-20).Mode of access: Internet
"November 1985."Includes bibliographical references (p. 15-17).Mode of access: Internet
"June 1987."Includes bibliographical references (p. 16-18).Mode of access: Internet
"June 1987."Includes bibliographical references (p. 12-13).Mode of access: Internet
"September 1987."Includes bibliographical references (p. 15-17).Mode of access: Internet
"FWS/OBS-82/10.53.""September 1983."Includes bibliographical references (p. 13-14).Mode of access: I...
"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."July 1985."Includes bibliographical references (p. 19-23).Mode of access: Interne...
"September 1985."Form precedes t.p.Includes bibliographical references (p. 32-36).Mode of access: In...
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. 18-21).Mode of access: Inter...
Form precedes t.p."August 1985."Includes bibliographical references (p. 24-29).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. 28-32).Mode of access: Inter...