Joint Hearings Before the Senate Select Committee on Secret Military Assistance to Iran and the Nicaraguan Opposition and the House Select Committee to Investigate Covert Arms Transactions with Iran, One Hundredth Congress, First Session, 100-3, May 20, 21, 27, and 28, 1987 : Testimony of Adolfo P. Calero, John K. Singlaub, Ellen C. Garwood, William B. O'Boyle, Joseph Coors, Robert C. Dutton, Felix I. Rodriguez, and Lewis A. Tambs