http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
239..466 -- M[A]CKOWN,Harry C[harles]: -- Activities in the elementary school. -- 4.impr. - New York,London:McGraw-Hill -- 1938.XX,473 S.mit Abb. 8° -- (McGraw-Hill Series in education.) -- 1950:2119