Hansen, A. P. (1994). Symbiotic N2 Fixation of Crop Legumes: Achievements and perspectives. Neunkirchen, Germany: Margraf Verlag.
Dyfyniad Arddull ChicagoHansen, Alexander P. Symbiotic N2 Fixation of Crop Legumes: Achievements and Perspectives. Neunkirchen, Germany: Margraf Verlag, 1994.
Dyfyniad MLAHansen, Alexander P. Symbiotic N2 Fixation of Crop Legumes: Achievements and Perspectives. Neunkirchen, Germany: Margraf Verlag, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.