- 1 Albert Sommer
Petroleum as a source of power on ships
London: General Oil Publishing 1910; 63 S.
Schiffsantrieb; Erdöl - 2 Albert Sommer
Necassary reforms in specifications for petroleum products
Philadelphia (PA): 1910; 12 S.
Erdölprodukt - 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