Ditto directed study lessons in American history
Subtitle: Printed in Ditto Ink
By: Prepard by William V. Burger
Publisher: Ditto, Inc.
Published: 1935
Place of publication: Chicago
Language: eng
Subjects: History; Problems, exercises
Notes: From Suggestions to teachers: "All the lessons in this book are printed in Ditto copying ink. They are master sheets which when torn out and run on Ditto duplicating machines, reproduce 50 to 100 copies on blank paper stock."

High School.