- 1 Harrington Emerson
Efficiency as a basis for operation and wages
New York: Engineering Magazine 1912; XII, 254 S.
Unternehmen; Wirtschaftlichkeit - 2 Harrington Emerson
The twelve principles of efficiency
New York: Engineering Magazine 1912; XVIII, 423 S.
Unternehmen; Wirtschaftlichkeit - 3 Albert Sommer
Trinidad liquid asphalt : a reprint of "Trinidad asphaltic petroleum and its use as road material"
New York (City): Engineering Record 1911; 11 S.; Ill.
Asphalt; Trinidad - 4Stettiner Maschinenbau Actien-Gesellschaft "Vulcan" : their works and manufactures
London: Engineering 1899; 57 Seiten, 9 Tafeln; Illustrationen