Edges of DJ and boards have light shelfwear and rubbing. DJ protected with mylar and not clipped. Pages tight and clean. Library discard with usual marks and attachments. Pocket removed. 128 pages. HardCover Binding. Year: 1968. ISBN: 0671650165. How can men breathe, live and work in the sea? How can the resources of the sea be harnessed to supply more than the present one percent of man's food supply? Can whales be trained to herd shrimp? Finding the answers to these and a host of other questions is the life work of the scientists called oceanographers, who probe the secrets of the sea from ships, submarines, ocean-bottom dwellings and landbound laboratories.