* [https://books.google.com/books?id=O0g0AQAAMAAJ&pg=PA422 Bulletin of the Society for the Promotion of Engineering Education, Volume 9], Frank J. Goodnow | * [https://books.google.com/books?id=O0g0AQAAMAAJ&pg=PA422 Bulletin of the Society for the Promotion of Engineering Education, Volume 9], Frank J. Goodnow |