(1958). Hearings before the joint committee on Washington metropolitan problems congress of the United States /: Eighty-fifth congress second session on water supply and pollution problems in Maryland, Virginia, and the Wasgington metropolitan area. Washington: Government Printing Office.
Παραπομπή Chicago StyleHearings Before the Joint Committee On Washington Metropolitan Problems Congress of the United States /: Eighty-fifth Congress Second Session On Water Supply and Pollution Problems in Maryland, Virginia, and the Wasgington Metropolitan Area. Washington: Government Printing Office, 1958.
Παραπομπή MLAHearings Before the Joint Committee On Washington Metropolitan Problems Congress of the United States /: Eighty-fifth Congress Second Session On Water Supply and Pollution Problems in Maryland, Virginia, and the Wasgington Metropolitan Area. Washington: Government Printing Office, 1958.