Illinois recommended standards for sewage works /

Effective March 31, l980.

Private sewage disposal licensing act and code, 2003.

"12/02"--Colophon.

Public hearings on the draft NPDES permit for surface discharging private sewage disposal systems : Common Q & A.

"December 2006"

Relative effects on stream biota of chlorine and ammonia occurring in secondary sewage /

"Project no. 20./32."

Sewage disposal in Metropolitan Chicago : research report prepared pursuant to Proposal 638, by Senator W. Russell Arrington.

"Preliminary print."

Two-phase anaerobic digestion for enhanced stabilization and methanation of sewage sludge /

"ILENR/AE-92/02."

A few practical remarks on the improvement of grass land, by means of irrigation, winter-flooding, and drainage, in a letter to the owners and occupiers of land, in the county of Essex.

Mode of access: Internet.

Irrigation practice and engineering.

Contains bibliographies.

Irrigation & drainage : a national research plan to meet competing demands and protect the environment.

Shipping list no.: 2002-0055-P.

Determining consumptive use and irrigation water requirements /

Caption title.

Tolerance of certain crops to several aquatic herbicides in irrigation water /

Caption title.

Summary of irrigation-district statutes of western states /

"January, 1931."

Response of several crops to six herbicides in irrigation water /

Cover title.

The Salt problem in irrigation agriculture : research at the United States Regional Salinity Laboratory.

Cover title.

Irrigation agriculture in the West /

"Issued November 1948."