TY - BOOK ID - 135338432 TI - Modeling system operators affecting the information organizer of an individual PY - 1991 SN - 9514557735 PB - Helsinki University of Helsinki. Department of education DB - UniCat KW - Information theory KW - Social systems KW - System theory UR - https://www.unicat.be/uniCat?func=search&query=sysid:135338432 AB - ER -