Key to the Advanced arithmetic.
(California state series) Containing full solutions to all of the examples, with an appendix containing the answers to fifteen hundred examples in the Primary number lessons,
prepared by A. M. Armstrong.

APA Citation

Armstrong, A. M., California. State Board of Education. (1888). Key to the Advanced arithmetic: (California state series) Containing full solutions to all of the examples, with an appendix containing the answers to fifteen hundred examples in the Primary number lessons. San Francisco: The Bancroft company.

MLA Citation

Armstrong, Albert M, and California. State Board of Education. Key to the Advanced Arithmetic: (California State Series) Containing Full Solutions to All of the Examples, With an Appendix Containing the Answers to Fifteen Hundred Examples In the Primary Number Lessons. San Francisco: The Bancroft company, 1888.