1. 1. Jindal SK, Gupta D. Incidence and recognition of interstitial pulmonary fibrosis in developing countries. Curr Opin Pulmon Med 1997;3:378-83.
2. 2. Sharma SK, Pande JN, Guleria JS. Diffuse interstitial pulmonary fibrosis. Indian J Chest Dis Allied Sci 1984;26:214-9.
3. 3. Jindal SK, Malik SK, Deodhar SD, Sharma BK. Fibrosing alveolitis:a report of 61 cases seen over the past five years. Indian J Chest Dis Allied Sci 1979;21:174-9.
4. 4. Gupta D, Behra D, Joshi K, Jindal SK. Role of fiberoptic bronchoscopy (transbronchial lung biopsy) in diagnosis of parenchymal lung disease. J Assoc Physicians India 1997;45:371-3.
5. 5. Thiruvengadam KV, Chandrasekaran AN, Kulandaivelu V, Inbavazhvu MN, Venkatramani K. Pleuro pulmonary manifestations of rheumatoid arthritis. Indian J Chest Dis Allied Sci 1979;21:35-52.