MADRID - Outraged students at Madrid University have forced the withdrawal of a textbook, written by their psychology professor, in which blacks were described as "inferior to whites" Asians as "slow, clumsy and lacking imagination" and women as "passive, unstable and feeble". The book's author, Prof Guillermo Quintana, professor of educational psychology at the Complutense University, remains defiant, claiming he has been a victim of political correctness and said he plans to issue a revised version.