Krishnan Nair, K. 1937. Changes in the Internal Structure of the Air-Bladder of <I>Pangasius pangasius</i> (Ham.) During Growth. Records of the Zoological Survey of India. 39, 2 (Jun. 1937), 117–124. DOI:https://doi.org/10.26515/rzsi/v39/i2/1937/162294.