An international year-book devoted to pure and applied plant and animal sciences / ed. by Frans Verdoorn. Verdoorn, Frans. 1906- [from old catalog] ed. Biology Periodicals. Botany Periodicals. QK1 .C55 vol. 13, no. 4/6 22 580 VAO Mass. : Chronica Botanica , 1951. 1951. uuuu Text v. 13 : eng v. 1: 38 cm. [from old catalog] Chronica botanica. [from old catalog]