1. Bardam suprapubic retainer and Breakey-Burhans nephrostomy retainer. Urological Instruments, C. R. Bard Inc., Summit, N. J., 1952, pp. 33, 37.
2. A plastic holder for nephrostomy tubes;Palken;J. Urol.,1953
3. Retention discs. Urological and Allied Diagnostic Instruments and High Frequency Equipment. American Cystoscope Makers, Inc., New York, N. Y., 1952, p. 198.