https://openlibrary.org/books/OL6245329M.opdsMotivation and market behavior2020-09-27T14:28:59ZRobert Ferberhttps://openlibrary.org/authors/OL135880A/Robert_FerberR. D. IrwinHomewood, Ill1958437 p.enghttps://openlibrary.org/books/OL6245329Mhttps://archive.org/details/motivationmarket00ferb54268158005803