Animals without backbones : 1 Amoebas, sponges, corals, jellyfish, anemones, octopi, whels, limpets, flukes, snails, slugs, and many other invertebrates

Buchsbaum, Ralph

Animals without backbones : 1 Amoebas, sponges, corals, jellyfish, anemones, octopi, whels, limpets, flukes, snails, slugs, and many other invertebrates - 204 p. ill.