Why on earth did it happen?
Subtitle: The geographic factors conditioning American history
By: by John Robert Swenson.
Publisher: Tardy Publishing Company, inc.
Published: 1935
Place of publication: Dallas, Tex
Language: eng
Number of pages: 256
Subjects: United States -- Historical geography.; United States -- History.
Notes: The material in the present volume gradually accumulated and arranged itself in the process of supplementing and interpreting Miss Semple's "American history and its geographic conditions."  cf. Foreword.