"organ in many arachnids containing many thin folds of membrane resembling the leaves of a book"@en-us . "105211731"@en-us . . "0"^^ . . . "0"^^ . . . "105528245"^^ . . "05528245-n"^^ . "book lung"@en-us . "104281630"@en-us . "book lung"^^ . . . . . .