"Solving \"mixed-acid\" problems by use of determinants."; "Deatrick, E. P. (Eugene Peyton), 1889-"; "Determinants.", "Agriculture--Mathematical models."; "Deatrick, E. P. (Eugene Peyton), 1889-"; "1931"; "Journal article reprint from: Industrial and Engineering Chemistry, v.23 (1931:Jan.)."; ""; "P17733"; "pec"; "Agriculture--Mathematical models.", "Determinants."; "14256"; .