By David R. Lide (National Institute of Standards & Technology (Retired), Gaithersburg, Maryland, USA)
By Aksel L. Lydersen, Ingrid Dahlo
By Petr Beckmann
By Earl Robert Babbie, Frederick S. Halley, William E. Wagner, Jeanne S. Zaino
By Frederick Grinnell
By J.C. Yates
By Carol Price
By Bellos, Alex
By Evans, Kevin, Gordon, Keith, Senior, Trevor, Speed, Brian, Kevin Evans, Keith Gordon, Trevor Senior, Brian Speed
By Gordon, Keith
By Smital
By Berry, Wendell
By Barry Render, Ralph M. Stair
By Ken Croswell
By Jon Entine
By Michael Shea
By Jeffrey Ma
By Eleanor Lawrence
By Glenn D. Considine, Peter H. Kulik
By McGraw Hill
By Anthony I. Mallet (University of Greenwich, UK), Steve Down (Downstream Data, USA)
By J. Stenesh (Western Michigan University)
By Nicholas P Cheremisinoff, Consulting Engineer (Director of Clean Technologies and Pollution Prevention Projects at Princeton Energy Resources International, LLC, Rockville, MD, USA)
By W. Carl Gottschall (Consultant, Littleton, Colorado), Douglas B. Walters (President, KCP, Inc., Raleigh, North Carolina)
By Richard Fitter, Alastair Fitter, Ann Farrer
By Edward Albee
By Robert Lapham, Heather Agar
By na, Collins