http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
how play motivates and enhances children's cognitive and social-emotional growth
edited by Dorothy G. Singer, Roderta Michnick Golinkoff, Kathy Hirsh-Pasek
Περιλαμβάνει βιβλιογραφίες και ευρετήριο