TY - BOOK ID - 127996655 TI - Control of human behavior. 3: Behavior modification in education AU - Ulrich, Roger AU - Mabry, John AU - Stachnik, Thomas PY - 1974 SN - 0673076210 PB - New York (N.Y.) : Scott, Foresman, DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:127996655 AB - ER -