PRASAD, J N1957-10-012009-05-271957-10-012009-05-271957-10-01PRASAD JN. The electro-retinogram of bat and owl. Indian Journal of Medical Research. 1957 Oct; 45(4): 543-8http://imsear.searo.who.int/handle/123456789/18757engElectroretinographyJournal Article