- 1Edward Kirk
The cupola furnace : a practical treatise on the construction and management of foundry cupolas
Philadelphia (PA): Henry Carey Baird 1899; XVIII, 361 S. : Ill.
Kupolofen - 2Benjamin J. Crew
A practical treatise on petroleum : comprising its origin, geology, geographical distribution, history, chemistry, mining, technology, uses and transportation
Philadelphia (PA): Henry Carey Baird & Co. 1887; XXIV, 508 S., 2 Taf.; Ill.
Erdöl