CLARK, R L The evolution of the treatment of pilonidal cysts and sinuses. [electronic resource] - The Journal of the Indiana State Medical Association Aug 1946 - 387-92 p. digital Publication Type: Journal Article ISSN: 0019-6770 Subjects--Topical Terms: Biological EvolutionFistulaHumansParanasal SinusesPilonidal Sinus--therapy