1. 1. Bannister LH. Respiratory System. Gray's Anatomy. 38th Edition. Edinburgh: Churchill Livingstone. 1995; 1657.
2. 2. Romanes GJ. Cunningham's Manual of Practical Anatomy Thorax and Abdomen 15th Edition. 1986; Volume 2: 30.
3. Fetal and postnatal development of the lung;Burri;Annu Rev Physiol,1984
4. 4. Langston C, Kida K, Reed M, Thuribeck WM. Human lung growth in late gestation and in the neonate. Amer. Rev. Respir. Dis. 1984; 129: 607-613.
5. Lung growth and development;Suchita;Early Human Development,2007