THE BIOLOGICAL INSTITUTE OF HELGOLAND Open PDF Document Details Document Type Technical Report Publication Date Dec 28, 1965 Accession Number AD0477358 Entities People L. E. Cronin Organizations Office of Naval Research Tags Communities of Interest Ground and Sea Platforms DTIC Thesaurus Topics Abstracts Animals Aquatic Organisms Biology Contracts Ecology Environment Fish Habitats Marine Biology North Sea Oceanography Oceans Research Facilities Salt Water Sea Water Students