00502nam a22001697a 4500 180913b xxu||||| |||| 00| 0 eng d 9781444126037 500 Riley, Peter D. 17718 Checkpoint Science 1 by Peter D. Riley New edition London Hodder Education 2011 vi, 250 p. ill. fig.tab. Cambridge Checkpoint Science 1 includes bibliographical references & index ddc BK 27341 27341