Wolbert, G. S. (1952). American pipe lines, their industrial structure, economic status, and legal implications. University of Oklahoma Press.
Dyfyniad Arddull ChicagoWolbert, George S. American Pipe Lines, Their Industrial Structure, Economic Status, and Legal Implications. Norman: University of Oklahoma Press, 1952.
Dyfyniad MLAWolbert, George S. American Pipe Lines, Their Industrial Structure, Economic Status, and Legal Implications. University of Oklahoma Press, 1952.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.