PCB 74-172

		PCB 74-172 05/09/74 Order WEBER MARKING SYSTEMS, INC. v. ENVIRONMENTAL PROTECTION AGENCY
		PCB 74-172 08/01/74 Order WEBER MARKING SYSTEMS, INC. v. ENVIRONMENTAL PROTECTION AGENCY
		PCB 74-172 08/08/74 Opinion and Order WEBER MARKING SYSTEMS, INC. v. ENVIRONMENTAL PROTECTION AGENCY