Author
Great Britain
4
Bartley, Douglas Cole
2
Bell, William James
2
Hedderwick, Thomas Charles Hunter
2
Breed, Abbott & Morgan (Firm)
1
Caffey, Francis Gordon
1
Clapperton, George
1
Hall, William Clarke
1
Harris, William Julius
1
Lloyd, Charles F.
1
Pickering, G. H.
1
Robinson, R. A.
1
Scrivener, Harry Stanley
1
Thornton, William Wheeler
1
United States Dept. of Agriculture
1
United States Federal Trade Commission
1
United States Industrial Commission
1
Westervelt, James
1