I began a survey of the dominant ninth chord in treatises and textbooks in 2019 with a post on a figured-bass manual by Simon Sechter (link) and another discussing the repertoire list for a score anthology (link). The work got underway seriously a couple months later, however, with a series of posts in August and September covering Catel through Schoenberg (link to the first post). After a considerable hiatus and following a library visit, I began again in May 2023 and discussed 12 books published in the United States from roughly 1930 to 1970 (link to the first post).
Here I continue with six more books; these were picked up online through the Internet Archive or Google Books.
Friedrich Johann Lehmann, Harmonic Analysis (Oberlin, OH: A. G. Coming, 1910)
Charles L. Seeger, jr., and Edward G. Stricklen, Harmonic Structure and Elementary Composition (Berkeley, CA: [self-published], 1916)
Carl E. Gardner, Music Composition: A New Method of Harmony (New York, Carl Fischer, 1918)
Arthur Olaf Anderson, The First Forty Lessons in Harmony (Boston: C. C. Birchard, 1923)
Harold B. Maryott, The Essentials of Harmony (Chicago: Gamble Hinged Music, 1923)
Gustave Strube, The Theory and Use of Chords: A Text-Book of Harmony (Boston: Ditson, 1928)