Concentration,
by Annie Rix Militz.
APA Citation
Militz, A. Rix. (1918). Concentration. Los Angeles, Cal.: Master Mind Pub. Co.
MLA Citation
Militz, Annie Rix, -1924. Concentration. Los Angeles, Cal.: Master Mind Pub. Co, 1918.
Warning: These citations may not always be complete (especially for serials).