However I think I have found what you are really after.
I'm assuming you are referring to the book "Chemical Calculations: The Hartree-Fock Method with the Chemical Bond as a Guiding Concept" by H. Benson Harris (also known as Harold Benson) but likely you are referring to Frank Benson or more likely still, possibly Hugh C. Benson or possibly just plain Benson in some document not easily referenced.
probably"Chemical Engineering and Chemical Calculatons"... calculos quimicos benson pdf
But I think I actually found..
You are actually likely referring to "Chemical Calculations" by Frank C. Benson However I think I have found what you are really after
I think likely By Benson
by Harris.
The second "edition or so" By Frank Benson and possibly other authors titled
