Proceedings of the fourteenth PME conference
Subtitle: with the North American Chapter twelth PME-NA conference : [held in] Mexico, July 15-20 1990
By: editors: George Booker, Paul Cobb, Teresa N. de Mendicuti.
Contributors: Booker, George.; Cobb, Paul.; Mendicuti, Teresa N. de.
Publisher: PME
Published: 1990
Place of publication: Mexico
Language: mul
Notes: Majority of chapters in English, with some in French or Spanish.