O. Ray Whittington, "Wiley CPA Excel Exam Review Spring 2014 Study Guide: Business Environment and Concepts" English | ISBN: 1118917863 | 2014 | 480 pages | PDF | 4 MB
Wiley's Remediation Technologies Handbook: Major Contaminant Chemicals and Chemical Groups Wiley-Interscience | ISBN: 0471455997 | 1288 pages | PDF | June 7, 2004 | English | 10 Mb
O. Ray Whittington, "Wiley CPAexcel Exam Review 2015 Study Guide (January): Business Environment and Concepts" English | ISBN: 1118917634 | 2015 | 480 pages | PDF | 2 MB