Economic impact of changing the carbon monoxide emission limitations for steel mills, R78-1 /

Includes bibliographical references.

Economic impact of proposed regulation R77-12 (Rule 950) on wastewater sludge disposal in the State of Illinois /

Includes bibliographical references.

Economic impact of requiring maintenance/malfunction plans for air pollution control equipment, R79-3 /

Project no. 10.080.

Economic impact of proposed amendments to snowmobile noise regulations, R79-10 /

Bibliography: p. 12.

Economic impact of dissolved solids regulation upon the coal mining industry (R76-7) /

Includes bibliographical references.

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

"Printed: January 1990."

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."