An electrical method of determining the soluble salt content of soils : with some results of investigations on the effect of water and soluble salts on the electrical resistance of soils /

Mode of access: Internet.

Municipal water facilities; communities of 25,000 population and over.

Mode of access: Internet.

Ohio River Basin comprehensive survey-- [microform] main report and development program formulation. Communication from the Chairman, United States Water Resources Council, transmitting the Council's report on a comprehensive program for water and related land use in the Ohio River Basin, pursuant to Public law 89-80.

Reuse of record except for individual research requires license from Congressional Information Service, Inc.

Annotated bibliography on the effects of irrigation practices on stream water quality with emphasis on salinity and pesticides /

Mode of access: Internet.

Water metals no.3 : study number 23 ; report of a study conducted by Analytical Reference Service.

Mode of access: Internet.

The operation of water filtration plants of the mechanical gravity type.

Originally issued in 1923, prepared by George F. Catlett, as Special bulletin no. 211 of the North Carolina Board of Health, Bureau of Engineering and Inspection.

The floods of May 1943 in Illinois.

Mode of access: Internet.

Procedural guide covering Project Associated Resources plans and reservoir area management plans ("PAR" plans) for water resources projects;

Mode of access: Internet.

"Maintenance of blood supplies in Illinois" : transcript of public hearings /

Cover title.

A directory of Illinois nature preserves /

Mode of access: Internet.

A directory of Illinois nature preserves /

v.1. Northeastern Illinois -- v.2. Northwestern, Central and Southern Illinois.

A Field guide to the wetlands of Illinois.

Includes index.

A Feasibility study of cancer surveillance in Illinois /

Project no.: 90.026.

A log book of your lake.

"#31230"--Colophon.

A Preliminary assessment of the increased speed limit on rural interstate highways in Illinois /

At head of title on cover: Welcome to life in Illinois.