Public safety officers' benefits act--law enforcement officers' bill of rights : hearings before the Subcommittee on Immigration, Citizenship, and International Law of the Committee on the Judiciary, House of Representatives, Ninety-third Congress, first session on H.R. 12, S. 15, H.R. 163, H.R. 4598 and H.R. 6449, Public safety officers' benefits act; and law enforcement officers' bill of rights, July 25 and 26, 1973