Colburn, Warren A Key Containing the Answers to the Examples in the Introduction to Algebra Upon the Inductive Method of Instruction Colburn, Warren Colburn's First Lessons: Intellectual Arithmetic, Upon The Inductive Method Of Instruction Colburn, Warren Warren Colburn's First Lessons Colburn, Warren First Lessons in Arithmetic: On the Plan of Pestalozzi, With Some Improvements Colburn, Warren Intellectual Arithmetic: Upon the Inductive Method of Instruction Sök bara efter: Colburn, Warren
