1. Prevalence of various types of heart diseases in Kathmandu;Pandey, M.R.; Ghimire, M.;J Nepal Med Assoc,1975
2. Standardized questionnaires on respiratory symptoms;Council, Medical Research;Br Med J,1960
3. Snowbird Workshop on Standardisation of Spirometry: a statement by the American Thoracic Society;Gardner, R.M.;Am Rev Respir Dis,1979
4. Definition and classification of chronic bronchitis for clinical and epidemiological purposes;Council, Medical Research;Lancet,1965
5. Report ofan expert committee on chronic cor pulmonale;World Health Organisation,1961