Mystery of MindLeonard T. (Leonard Thompson) Troland · First published 1926 · Latest edition 2021Open the Tome
The Nature of Matter and ElectricityLeonard Thompson Troland, Daniel Frost Comstock · First published 2018Open the Tome
Bulletin of the National Research Council - the Present Status of Visual Science -Leonard Thompson Troland · First published 2011Open the Tome
The nature of matter and electricityDaniel Frost Comstock, Leonard Thompson Troland · First published 1917Open the Tome
