By Timothy Timoshenko
By Donald Pitts, Leighton Sissom
By Nicholas P Cheremisinoff, Consulting Engineer (Director of Clean Technologies and Pollution Prevention Projects at Princeton Energy Resources International, LLC, Rockville, MD, USA)
By A.E. Peatfield
By Marshall, Elizabeth
By W. Bolton
By Askeland, Donald R.
By Collett, Charles Vincent, Hope, A. D.
By Gilat, Amos
By Phillips, Charles L., Harbor, Royce D.
By Muir, Jim
By A C Davies
By H. Versteeg, W. Malalasekera
By A. Bolisher, etc.