"Continental shelf Juvenile literature." . . "Continental shelf." . . "Marine biology Juvenile literature." . . . . "Marine biology." . . . . . "The continental shelf"@en . "The continental shelf" . "Examines the physical features and biology of marine environments surrounding the earth's landmasses and discusses characteristics of the sea floor, food chains, microbes, reptiles, birds, worms and more including human impact on these areas."@en . . "Juvenile works"@en . "Juvenile works" . . . . "Electronic books"@en . . "Downloadable Infobase Learning ebooks"@en . . . . . . . . "Describes features and physical aspects of the relatively shallow waters surrounding large landmasses, including tidal energy, sea grasses, and kelp, and focuses on inhabitants such as crustaceans, echinoderms, and groundfish." . .