APA

Parkash Singh, University of Delhi. Faculty of Medical Sciences. Department of Surgery, Dr S Mukherjee Supervisor & University of Delhi. Faculty of Medical Sciences. Department of Surgery. (1969). Clinico-radiological study of patients of chronic duodenal ulcer after billroth-I and polya gastrectomy. : .

Chicago

Parkash Singh, University of Delhi. Faculty of Medical Sciences. Department of Surgery, Dr S Mukherjee Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Surgery. 1969. Clinico-radiological study of patients of chronic duodenal ulcer after billroth-I and polya gastrectomy. : .

Harvard

Parkash Singh, University of Delhi. Faculty of Medical Sciences. Department of Surgery, Dr S Mukherjee Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Surgery. (1969). Clinico-radiological study of patients of chronic duodenal ulcer after billroth-I and polya gastrectomy. : .

MLA

Parkash Singh, University of Delhi. Faculty of Medical Sciences. Department of Surgery, Dr S Mukherjee Supervisor and University of Delhi. Faculty of Medical Sciences. Department of Surgery. Clinico-radiological study of patients of chronic duodenal ulcer after billroth-I and polya gastrectomy. : . 1969.