Stepping up to science and math
Goldston M. JeniceKniha
Citace v seznamu literatury:
GOLDSTON, M. Jenice (ed.). Stepping up to science and math: exploring the natural connections. Arlington, Va.: NSTA Press, c2004. ISBN 0873552520. Dostupné také z: http://www.loc.gov/catdir/toc/ecip0421/2004017785.html.