Imponderablesde Feldman, DavidMateriasQuestions and answersCuriosities and wondersHumorEdiciones (1)Imponderables (2004)Reader's Digest Association · inglés · ISBN 9780762108923Más obras de Feldman, DavidWhy do clocks run clockwise? and other imponderablesWhy do dogs have wet noses? and other imponderables of everyday lifeHow do astronauts scratch an itch?