1. G. Barzilai (1943 ) Atlas of Ovarian Tumours Grune and Stratton, New York, pp. 161 /161 .
2. TUBAL METAPLASIA OF THE ENDOMETRIUM
3. J. R. Goodall (1943 ) A Study of Endornetriosis, Endosalpingiosis, Endocervicosis and Peritoneo-ovarian Sclerosis, 2nd edn , J. B. Lippincott, Philadelphia, pp. 90 -91 .
4. THE SECONDARY MÜLLERIAN SYSTEM