المؤلفون: Spain, David M., Bradess, Victoria A., Iral, Pedro T., Cruz, Antonia G.

المصدر: Geriatrics; Jul1962, Vol. 17 Issue 7, p416-420, 5p, 3 Black and White Photographs, 2 Charts

المؤلفون: Lowenfels, Albert B. ^*, Sobol, Bruce J. ^**, C. Morsch, Hans H. ^***, Iral, Pedro ^****

المصدر: In The Journal of Thoracic and Cardiovascular Surgery August 1972 64(2):296-300