Environmental and economic implications of agricultural trade and promotion policies in Kenya : pest and pesticide management /

"April 1995."

Pest and pesticide management in Illinois agriculture : status and policy options /

"Contract IP 3."

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

Caption title.

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

"October 1998."

The ecological condition of estuaries in the Gulf of Mexico /

"July 1999."

Forest pest conditions in the Pacific Northwest.

Some issues have a distinctive title.