1. P. Armitage (1971 ) InStatistical Methods in Medical Research , pp.97 -98 . Wiley, New York.
2. L. C. Harber, and D. R. Bickers (1981 ) InPhotosensitivity Diseases. Principles of Diagnosis and Treatment , pp.75 -84 . W. B. Saunders, Philadelphia, PA.
3. L. C. Harber, and F. Urbach (1969 ) InThe Biologic Effects of Ultraviolet Radiation with Emphasis on the Skin (), pp.291 -293 . Pergamon Press, London.
4. Effect of Humidity on the Photosensitive Response to 8-Methoxypsoralen**From the Department of Dermatology of the New York University Schools of Medicine, New York, N.Y.