1. Buddemeyer EU: The physics of diagnostic ultrasound. Radiol Clin North Am 13:391?402, 1975
2. Leo FP, Rao GUV: The technology of diagnostic ultrasound. Radiol Clin North Am 13:403?415, 1975
3. Sanders RC: Radiological and radioisotopic diagnosis of perihepatic abscess. CRC Crit Rev Radiol Nucl Med 5:165?211, 1974
4. Leyton B, Halpern S, Leopold G, Hagen S: Correlation of ultrasound and colloid scintiscan studies of the normal and diseased liver. J Nucl Med 14:27?33, 1973
5. Jenson F, Pedersen JF: Value of ultrasonic scanning in the diagnosis of intra-abdominal abscesses and hemotomas. Surg Gyn Obstet 139:326?328, 1974