At head of title: Library of Congress.Prefatory note signed: W. F. Koenig, classifer in charge."Begun under the direction of Mr. Charles Martel, then ...
Prefatory note signed: W. F. Koenig, classifer in charge.
"Begun under the direction of Mr. Charles Martel, then chief classifier, and continued and prepared for the press under the supervision of Mr. Clarence W. Perley, chief of the Classification division."--Pref.