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2. Unger , W. P. Construciion of the hairline in hair transplanting 1976
3. Management of alopecia of the scalp by a combination of excision and transplantations;Unger;J. Dermatol. Surg. Oncol.,1978
4. Unger , W. P. Hair counts: a scientific approach to the evaluation of variable factors if hair trinsplanting 1977