TY - BOOK ID - 148953211 TI - Frustration : the study of behavior without a goal PY - 1949 SN - 0313233403 PB - New York : McGraw-Hill, DB - UniCat KW - Frustration. UR - https://www.unicat.be/uniCat?func=search&query=sysid:148953211 AB - ER -