Reference books 上清充通大￥ SHEAMGRAI DUD TONO UHTVEREETTY Hot Working Guide:A Compendium of Processing Maps Y.V.R.K.Prasad and S.Sasidhara ASM International The Materials Information Society Handbook of Workability and Process Design George E.Dieter,S.L.Semiatin October 1st 2003 by ASM International(OH) Institute of Forming Technology Equipment 41Reference books Institute of Forming Technology & Equipment 4 • Hot Working Guide: A Compendium of Processing Maps Y. V. R. K. Prasad and S. Sasidhara ASM International The Materials Information Society  Handbook of Workability and Process Design George E. Dieter, S.L. Semiatin October 1st 2003 by ASM International(OH)