Targhee National Forest ecological unit inventory /

Includes index to map sheets.

Ecological studies on the potato psyllid as a pest of potatoes /

Caption title.

Ecological investigations of the boll weevil, Tallulah, Louisiana, 1915-1958 /

Literature cited: p. 19-20.

Ecological and physiological factors influencing chemical control of Halogeton glomeratus /

Includes bibliographical references (p. 63-65).

Personal, societal, and ecological values of wilderness : sixth World Wilderness Congress : proceedings on research, management, and allocation /

"October 1998."