Ralph, R. (1975). Methods in experimental biology. Wiley.
Dyfyniad Arddull ChicagoRalph, Robert. Methods in Experimental Biology. New York: Wiley, 1975.
Dyfyniad MLARalph, Robert. Methods in Experimental Biology. Wiley, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.