Hardy, Alister R.: The Open Sea. It's Natural History: Part I, The World of Plankton. With 142 watercolour drawings, 67 photographs, 300 fig. 1956, repr. 1958. 335 p. Part II, Fish & Fisheries, with chapters on Whales, Turtles, and Animals of the Sea Floor. With 16 watercolour drawings, 68 photographs, 114 fig, 322 p. London 1959: Collins Publ., “The New Naturalist” 34 + 37; 30 s each