National Audubon Society Field Guide to Rocks and MineralsCharles Wesley ChestermanEsaurito4,3Avvisami
National Audubon society field guide: North American Mushrooms, North American Trees (Western Region), North American Trees (Eastern Region), North American Wildflowers (Western Region), North American Wildflowers (Eastern Region)AA.VV.Esaurito4,3Avvisami
National Audubon society field guide: North American Butterflies, North American Insects & Spiders, North American Birds (Western Region), North American Birds (Eastern Region), North American Mammals, African Wildlife, North American Reptiles & AmphibiansAA.VV.Esaurito4,3Avvisami
National Audubon Society Field Guide to North American : Seashore Creatures; Fishes, Whales & Dolphins; Seashells; Tropical Marine FishesAA.VV.Esaurito4,3Avvisami
National Audubon Society field guide to North American birds. Western regionAA.VV.Esaurito4,3Avvisami
