"Serpientes (Estados Unidos)" . . "serpent Etats-Unis [guide]" . . . . "Snakes Canada." . . . . . . "Field book of snakes of the United States and Canada" . . "Field book of snakes of the United States and Canada"@en . . . "Field Book of Snakes of the United States and Canada" . "Field book of snakes of the United States and Canada : with four colored plates and 103 drawings by Albert A. Enzenbacher and 82 photographs from life" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Field book of snakes of the united states and canada with four colored plates and 103 drawings by albert A. Enzenbacher and 82 photo. From life" . . . . "Field Book of snakes of the United States and Canada" . . . . . "Field book of snakes of the united states and canada : by karl P. Schmidt and D. Dwight Davis. With four colored plates and 103 drawings by albert A. Enzenbacher and 82 photographs from life" . . . . . . "Snakes United States." . . "Reptiles Canada." . . "North America." . . "Serpientes (Canada)" . . "Amphibiens." . . "Reptiles United States." . . "Serpents Canada Identification Guides pratiques et mémentos." . . "serpent Canada [guide]" . . "Snakes North America." . . "Snakes." . . "Serpents États-Unis Identification Guides pratiques et mémentos." . . "Reptiles." . .