http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Informatics and the teaching of mathematics
proceedings of the IFIP TC 3/WG 3.1 Working Conference on Informatics and the Teaching of Mathematics : Sofia, Bulgaria, 16-18 May, 1987
IFIP TC 3/WG 3.1 Working Conference on Informatics and the Teaching of Mathematics (1987 : Sofia, Bulgaria)