Thomas, Georage B. creator Finney, Ross L. Weir, Maurice D. (with the collaboration of ) New Delhi Pearson Education 2007 9th ed Various pagings 28 cm (pbk) by George B. Thomas , Ross L. Finney and Maurice D. Weir 515 8177583255 RP-ZLS-2792 / PANSY-07-08:10 / RP-07-08:ENG