Sy mposiu ' m The Role of Cryosurgery in Management of Anorectal Disease

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[2]  K. L. Williams,et al.  Cryodestruction of Haemorrhoids , 1973, British medical journal.

[3]  M. I. Lewis.  Cryosurgical hemorrhoidectomy: A follow-up report , 1972, Diseases of the colon and rectum.