TY - BOOK AU - Litgenberger,Samuel C. ED - Office of agriculture TI - Guide for field crops in the tropics and the subtropics PY - 1974/// CY - Washington PB - Technical assistance bureau KW - BI-BuBU KW - récolte.Champs.Région tropicale KW - Région tropicale.Région sub-tropicale ER -