Evaluation of operation and maintenance factors limiting biological wastewater treatment plant performance /

Mode of access: Internet.

Ecotoxicological evaluation of area 9 landfill at Crab Orchard National Wildlife Refuge : biological impact and residues /

"HWRIC RR-062."

Biological control of alligatorweed, 1959-1972 : a review and evaluation /

Issued May 1977.

Design and evaluation of a terrestrial model ecosystem for evaluation substitute pesticide chemicals /

Mode of access: Internet.

Biological treatment of wood preserving site groundwater by BioTrol, Inc. : applications analysis report.

Mode of access: Internet.

Evaluation of hose-end sprayers used for applying liquid pesticides /

Mode of access: Internet.

Ecological systems approaches to aerobiology, II : development, demonstration and evaluation of models : proceedings of workshop/conference II, National Center for Atmospheric Research, Boulder, Colorado, 12-14 July 1972 /

At head of title: International Biological Program, United States National Committee, Aerobiology Program.