Language: Russian with English summaries
This volume contains the following papers:
- Sokolov: The Amazonian Dolphin (A Survey)
- Sokolov & Skurat: Morphological characteristics of the skin of the Amazonian Dolphin
- Stepanova: Specific features of the structure of the epidermis in the Amazonian Dolphin
- Rodionov: On the investigation of the vertebral column of the Amazonian Dolphin
- Rodionov: Comparative anatomy of the supracranial nasal ducts in the the Amazonian Dolphins and Bottlenose Dolphins
- Ladygina & Sanamyan: Macro- and microscopic investigation of the cortex in the Amazonian Dolphin
- Mass: Visual activity and topographical organozation of the retina in the Amazonian Dolphin
- Supin, Popov, & Klishin: Peculiarities of the audial perception of the Amazonian Dolphin
- Galantsev, Kupin, & Shereshkov. Respiration and cardiac activity of the Amazonian Dolphin
- Mukhametov: Peculiarities of the slow wave sleep in the Amazonian Dolphin
- Oleksenko, Chetyrbok, Polyakova, & Mukhametov: Rest and active states in the the Amazonian Dolphin
- Ushakova: Estral cycle of a female Amazonian Dolphin maintaned in captivity
- Fokina & Shmelev: Visual discrimination capabilties of the Amazonian Dolphin
- Sokolov & Yaskin: Distribution, population density and some behavioral peculiarities of the Amazonian Dolphin