1. CABOT, H., Proc. Staff Meetings, Mayo Cltnic, VIII, 76 (1933).
2. MUNRO, W. T., Edinburgh Medical Journal, XLVII, I15 (1941).
3. MEDLAR, Amer. Jour. Path., 1I, HARRIS, Brit. Jour. Surg., XVI, 5 (1926).
4. DIMrZA and KARTAL, Ztschr. F. Urol. Chir., XXXV, 4I6 (1932).
5. BAND, GRIFFITH and MUNRO, Edin. Med. Jour., XLII, i62 (1935).