Six selections from Irving's sketch-book, with notes, questions, etc., for home and school use,

Mode of access: Internet.

Law students' review and quiz book, in the form of questions which supply concrete statements of facts and of answers which set forth the legal principles involved; includes all important subjects, conforms to the practice of the most competent boards of law examiners,

Mode of access: Internet.

EIHI, environmental issues and human interactions : studies concerning man's interaction with the environment : [a product of the 1993 Summer Science Institute with the National Oceanic and Atmospheric Administration (NOAA), Environmental Research Laboratories (ERL)].

Mode of access: Internet.

Illinois directory of environmental information /

"Project No. 60.028."

Illinois environmental education resource guide : west central region /

"Fall 2000."

Persistent questions in public discussion; addresses and essays

Appendix contains bibliographies.