Marine mammal technical report
UNEP
by Stephen Leatherwood, Gregory P. Donovan
UNEP 1991 Marine mammal technical report no. 3
Available at 1 libraries
by Stephen Leatherwood, Randall R. Reeves
UNEP 1991 2nd ed Marine mammal technical report no. 1
Available at 2 libraries
compiled and edited for United Nations Environment Programme, Oceans and Coastal Areas Programme Activity Centre
UNEP 1991 Marine mammal technical report no. 2