| 1 |
1
The walrus, sea lions, fur seals and sea otter / edited by Sam H. Ridgway and Richard J. Harrison
Second printing. - London ; New York : Academic Press , 1993
|
| 2 |
vol. 2
Seals / edited by Sam H. Ridgway and Richard J. Harrison
London ; New York : Academic Press , 1981
|
| 3 |
3
The sirenians and baleen whales / edited by Sam H. Ridgway and Richard J.Harrison
London ; New York : Academic Press , 1985
|
| 4 |
4
River dolphins and the larger toothed whales / edited by Sam H. Redgway and Richard Harrison
London ; New York : Academic Press , 1989
|
| 5 |
5
The first book of dolphins / edited by Sam H. Ridgway and Sir Richard Harrison
London ; Tokyo : Academic Press , c1994
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