Regulation of lobbying : Hearings before the Committee on Standards of Official Conduct, House of Representatives, Ninety-first Congress, second session, on H. Res. 1031 ... October 1, 7, and 8, 1970

Politicians, interest groups, and regulators : a multiple-principals agency theory of regulation, or "let them be bribed"

Spiller, Pablo T., (1990)

Lobbying : Hearings, Ninety-second Congress, first session, on H.R. 5259, Legislative activities disclosure act. March 16 and 24, 1971

(1971)

Congressional investigation of lobbying : a selected bibliography

Tompkins, Dorothy C., (1956)