Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Psychologische Untersuchungen über das Lesen auf Experimenteller Grundlage / von Benno Erdmann und Raymond Dodge. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)