Norwegian whale sightings surveys in the North Atlantic, 1987

Citation:

Oritsland, T., N. Oien, J. Calambokidis, I. Christensen, J.C. Cubbage, S. Hartvedt, P.M. Jensen, G.G. Joyce, K. Tellnes, and B.L. Troutman. 1989. Norwegian whale sightings surveys in the North Atlantic, 1987. Report of the International Whaling Commission 39:411-415.