Bhirmanandan, C VChadha, J SSharma, P LWahi, P L1977-06-012009-05-301977-06-012009-05-301977-06-01Bhirmanandan CV, Chadha JS, Sharma PL, Wahi PL. A comparative double-blind adjustable dose clinical trial of penbutolol and propranolol in angina pectoris. Journal of the Association of Physicians of India. 1977 Jun; 25(6): 379-83http://imsear.searo.who.int/handle/123456789/89387engAdultAgedAngina Pectoris --drug therapyDouble-Blind MethodFemaleHumansMaleMiddle AgedPropanolamines --administration & dosagePropranolol --administration & dosageCase Reports