jinda jan-orn, C. Tonglad, W. Suwanwihok, A. Benponk, C. Breitenbach, and S. Wusuwat, “Comparative Studies of the Adaptability, Production, and Segregating Behavior of the Indigenous and a Newly-Introduced Guatemala Corn Varieties.1”, Agr. Nat. Resour., vol. 5, no. 3, pp. 122–127, Sep. 1965.