Economic impact study of R81-11 trihalomethane standards for public water supplies /

"Project no. 80-254."

Economic impact study of proposed airport noise regulations, R77-4 /

"January 1981."

Economic interdependency in the northeastern Illinois area /

"December 6, 1985."

Economic impact study of landfill regulations (R88-7) : final report /

"Printed: January 1990."

Economic outlook & forecast /

Copyrighted in 2008 by Moody's Analytics.

Economic impact study for proposed groundwater quality standards 35 IL Admin. Code 260 : final report /

"Contract: EA 98."

Economic impact study of proposed cross connection regulations, R87-37 : final report /

"Project: 89/283."

Economic impact studies : the first year in review.

"Project no. 60.028."

Economic impact study of proposed airport noise regulations, R 77-4. Volume I : technical study of public airports outside Chicago /

"Project no. 30.017."

Economic impact study of the proposed motor vehicle (in-use) noise regulations : report of the Task Force on noise.

Bibliography: p. 152-155.

Economic impact study of proposed regulation R82-7 for site-specific water pollution rules applicable to the city of Alton, Illinois /

Bibliography: p. R-1 to R-3.

Economic impact study of proposed IPCB regulation sections 215.240 and 215.207 : final report /

"Printed: June 1987."

Economic impact of the proposed change in the hydrocarbon emission limitation for petrochemical manufacturing processes (R77-3) /

Project no. 10.065.

Enhancing economic development through libraries /

"July 1998."

Environmental benefits assessment in economic impact studies : a review /

Project no.80.144.