United States. (1991). Selected environmental law statutes (1991-92 educational ed.). West Pub. Co.
Chicago-viite (17. p.)United States. Selected Environmental Law Statutes. 1991-92 educational ed. St. Paul, Minn: West Pub. Co, 1991.
MLA-viite (9. p.)United States. Selected Environmental Law Statutes. 1991-92 educational ed. West Pub. Co, 1991.
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