Purves Biologieby David Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker, Jürgen Markl, Andreas Held, Birgit Jarosch, Lothar Seidler, Monika Niehaus-Osterloh, Eva Sixt, Matthias DelbrückWriting a summary for young readers…For young readersBook data: Open Library