Conservation school guide leaflet: Fairgrounds, Springfield, Illinois : Springfield area, Sangamon Co. : Springfield Quadrangle.

"Leader: George M. Wilson.

Pennsylvanian spores of Illinois and their use in correlation / by Robert M. Kosanke.

"Manuscript completed in August 1948."

Illinois natural resources : an industrial developmental asset /

Cover title.

The Lake Champlain drainage basin : recommended classifications and assignments of standards of quality and purity for designated waters of New York State /

Mode of access: Internet.

Drainage basin survey report, Housatonic River drainage basin. Recommended classifications and assignment of standards of quality and purity for designated waters of New York State.

Mode of access: Internet.

Drainage basins of streams entering the Hudson River in Orange, Ulster, Dutchess and Putnam Counties, except Rondout Creek below Rondout Reservoir, Esopus Creek below Ashokan Reservoir, Wappinger Creek, and waters contained within boundaries of State-owned forest preserve lands; official classifications.

Cover title.

Water quality criteria /

Bibliography: p. 467-548.

New York City waters survey series report; recommended classifications and assignments of standards of quality and purity for designated waters of New York State.

no. 1. Upper Bay; East Lower Bay.--no. 2. Atlantic Ocean.--no. 3. Arthur Kill van Kull.--no. 4. Lower East River.--no. 5. The Harlem River.--no. 6. West Lower Bay; Raritan Bay portion of Staten Island.--no. 7. Jamaica Bay drainage basin.

Genesee River drainage basin survey series report; recommended classifictions and assignments of standards of quality and purity for designated waters of New York State.

No. 2. Upper Genesee River drainage basin.

Municipal parks and playgrounds in Illinois. August, 1939.

Mode of access: Internet.

George Rogers Clark and the revolution in Illinois, 1763-1787; a sesquicentennial memorial,

Mode of access: Internet.

Rules and regulations governing water supply applications.

Mode of access: Internet.

Bulletin - Illinois Natural History Survey.

Chemical abstracts

Story of Illinois series.

Mode of access: Internet.

Geological Survey of Illinois,

Vol. 8 edited by Josua Lindahl, state geologist.