APA

Sachdev Tilak Raj, University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine, Dr Prabha Malhotra Supervisor & University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine. (1972). Study on the prevalence of respiratory diseases amongst the workers of the steel rolling mills at Shahdara (Delhi). : .

Chicago

Sachdev Tilak Raj, University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine, Dr Prabha Malhotra Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine. 1972. Study on the prevalence of respiratory diseases amongst the workers of the steel rolling mills at Shahdara (Delhi). : .

Harvard

Sachdev Tilak Raj, University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine, Dr Prabha Malhotra Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine. (1972). Study on the prevalence of respiratory diseases amongst the workers of the steel rolling mills at Shahdara (Delhi). : .

MLA

Sachdev Tilak Raj, University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine, Dr Prabha Malhotra Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Preventive and Social Medicine. Study on the prevalence of respiratory diseases amongst the workers of the steel rolling mills at Shahdara (Delhi). : . 1972.