Hambidge, Jay, 1867-1924.

Practical Applications of Dynamic Symmetry
by Jay Hambidge, Edited and arranged by Mary C. Hambidge.
New Haven, Yale University Press, 1932. Second printing 1942. 109 pages.

This is a better description of Dynamic Symmetry than the earlier work. Please see the description under Dynamic Symmetry in Composition. (Cat 9.17)