TY - BOOK ID - 135484478 TI - Structure of matter in the school : proceedings of the 4th Danube seminar, Balaton, Hungary, 10-12 October 1978 PY - 1978 PB - Budapest Ëotvös-Universität DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:135484478 AB - ER -