Mittal Megha Measurement of air trapping among patients of chronic obstructive pulmonary disease and its correlation with the stage of the disease Mittal Megha; Dr. Harmanjit Singh Hira Gu.; Dr. Richa Dewan Gu. - 2008 - 72p. p. cm. Standard No.: 109495 Source: Theses Subjects--Topical Terms: MEDICINE