1. Bruneau, L., Jerlov, N. G., and Koczy, F., Rep. Swedish Deep Sea Expedition, 3, 99 (1953).
2. Neumann, A. C., and Densmore, C. D., unpublished manuscript, Ref., 60–2, Woods Hole Oceanographic Institution (1959).
3. Jerlov, N. G., Rep. Swedish Deep Sea Expedition, 3, 71 (1953).