Chopra, S., & Kanwar, J. (1959). Practical Agricultural Chemistry. S.Chand & company.
Dyfyniad Arddull ChicagoChopra, S.L, and J.S Kanwar. Practical Agricultural Chemistry. Delhi: S.Chand & company, 1959.
Dyfyniad MLAChopra, S.L, and J.S Kanwar. Practical Agricultural Chemistry. S.Chand & company, 1959.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.