APA
Conrad K., Morrison Catherine J, .The impact of pollution abatement investment on productivity change: an empirical comparison of the U.S., Germany, and Canada. : .
Chicago
Conrad Klaus, Morrison Catherine J, .The impact of pollution abatement investment on productivity change: an empirical comparison of the U.S., Germany, and Canada. : .
Harvard
Conrad K., Morrison Catherine J, .The impact of pollution abatement investment on productivity change: an empirical comparison of the U.S., Germany, and Canada. : .
MLA
Conrad Klaus, Morrison Catherine J, .: . .