Also Koehring Machine Company.
ADVERTISEMENTS[]
From the 1909 edition of Hendrick's Commercial Register
Concrete-Cement Age (December 1912)
Contractors' & Engineers' Purchasing Guide (May 1920)
Contractors' & Engineers' Monthly (July 1923)
American Builder (November 1923)
Contractors' & Engineers' Monthly (July 1924)
The Highway Engineer & Contractor (January 1925)
American Builder (April 1927)