1. Doppler Ultrasonic Evaluation of Venous Disease: A Programmed Audiovisual Instruction;Barnes,1975
2. Accuracy by Doppler ultrasound in clinically suspected calf vein thrombosis;Barnes;Surg Gynecol Obstet,1976
3. The fallibility of the clinical diagnosis of venous thrombosis;Barnes;JAMA,1975
4. Prophylaxis against thromboembolic disease;Convery,1975
5. Gastric bypass;Mason;Ann Surg,1969