1. 2. L. B. Arey: Developmental Anatomy , 6th ed. W. B. Saunders Co., Philadelphia, 1954 , pp.260 , 260 .
2. 3. J. C. Brash: Cunningham's Textbook of Anatomy , 9th ed. Oxford Univ. Press1951 , pp.821 , 821 .
3. Bilateral Pulmonary Agenesis
4. CONGENITAL ABSENCE OF LUNG