1. The Developing Human;Moore,1973
2. Medical Embryology;Langeman,1969
3. The development of the bronchopulmonary segments in human embryos of horizons XVII to XIX;Wells;Am J Anat,1954
4. Functional Anatomy and Histology of the Lung;Nagaishi,1972
5. Development of the pulmonary airways;Boyden;Minn Med,1971