@book{ Solr-fikka.3257386, title = {Calculation of the pH value of a mixture of solutions : an illustration of the use of chemical reaction invariants}, series = {Report / Åbo akademi. Kemisk-tekniska fakulteten. Institutionen för reglerteknik}, author = {Gustafsson, Tore K., 1950-}, address = {Åbo}, publisher = {Åbo akademi}, year = {1981}, }