Contribution from Bureau of Plant Industry, Soils, and Agricultural Engineering."For Spanish edition of this material see: ... [his] Fibras vegetales ...
Contribution from Bureau of Plant Industry, Soils, and Agricultural Engineering.
"For Spanish edition of this material see: ... [his] Fibras vegetales y su producción en América. Translated by María A. Ruisánchez Masters. Unión panamericana, Officina de cooperación agrícola Pub. agric. nos. 137-140."--Foot-notes, p. 1.