Virchow, D. (1999). Conservation of genetic resources: Costs and implications for a sustainable utilization of plant genetic resources for food and agriculture. Springer.
Dyfyniad Arddull ChicagoVirchow, D. Conservation of Genetic Resources: Costs and Implications for a Sustainable Utilization of Plant Genetic Resources for Food and Agriculture. Heidelberg: Springer, 1999.
Dyfyniad MLAVirchow, D. Conservation of Genetic Resources: Costs and Implications for a Sustainable Utilization of Plant Genetic Resources for Food and Agriculture. Springer, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.