Ocean -- Juvenile literature. Oceanography -- Juvenile literature. Marine ecology -- Juvenile literature. Marine pollution -- Juvenile literature. Tides -- Juvenile literature.

Marine ecology -- Pictorial works Marine pollution -- Pictorial works Marine resources conservation -- Pictorial works Aerial photography Underwater photography

Ocean and civilization Ocean -- History Oceanography

Oceanography Marine ecology Marine biology Marine pollution Nature -- Effect of human beings on

Marine pollution -- Juvenile fiction. Monsters -- Juvenile fiction.

Marine resources conservation -- Juvenile literature Marine pollution -- Juvenile literature

Oceanography Marine ecology Marine biology Marine pollution Nature -- Effect of human beings on

Marine pollution -- Pictorial works Photography, Artistic

Marine pollution -- Europe Hazardous substances -- Environmental aspects -- Europe Organic water pollutants -- Europe Metals -- Environmental aspects -- Europe

Environmental monitoring -- Mediterranean Region -- Information resources Marine ecology -- Mediterranean Region -- Information resources Coastal zone management -- Mediterranean Region Marine pollution -- Mediterranean Region -- Statistics

Ships -- Waste disposal -- European Union countries Waste disposal in the ocean -- European Union countries Marine pollution -- European Union countries