Roth Memory Course: A Simple and Scientific Method of Improving the Memory and Increasing Mental Power (seven volumes)

Independent Corporation, 1918. Very Good. Roth, David M.. Roth Memory Course: A Simple and Scientific Method of Improving the Memory and Increasing Mental Power (seven volumes). New York: Independent Corporation, 1918. Illustrated. 16mo. Stapled brown wraps. Book condition: Very good with gently bumped edges. Soft crease in lower corner of rear cover of volumes seven and two, and in lower corner of front cover of volume one. Small, inconspicuous spots on extremities of a couple volumes. Scarce. (Inventory #: RROTROT00LAW)