Nystrom, J. W. (1864). Pocket-book of mechanics and engineering (Ed. 9.).
Dyfyniad Arddull ChicagoNystrom, John W. Pocket-book of Mechanics and Engineering. Ed. 9. Philadelphia, 1864.
Dyfyniad MLANystrom, John W. Pocket-book of Mechanics and Engineering. Ed. 9. 1864.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.