Biblioteca Roosevelt Search for 'au:"Walker, Richard."'

Genes y ADN. / Richard Walker.

By Walker, Richard.. Mexico, MX : | Santillana, 2003 . 63 p. 968-19-1317-5

By Walker, Richard.. 2004. | Ede Edilupa, . 65 p. 84-96252-79-5

By Walker, Richard.. Londres, GB : Ede Edilupa, 2007 . 65 p. 978-84-96609-09-9

By Walker, Richard.. new York : DK, 2009 . 72 p.: il 978-0-7566-4545-8

By Walker, Richard.. New York, NY, US : Kingfisher, 2003 . 63 p. 978-0-7534-5621-7

By Walker, Richard.. México, D.F., MX : Oceano, 2009. . 71 p. : il. , Incluye CR-ROM 978-607-400-189-1.