[Agricultural bibliographical index of Venezuela. Fifth Supplement 1979-1984]

agronomia agronomie agronomy biografia biographie crops cultivos dairy industry enfermedades de las plantas fruit crops frutales geografia geographie geography horticultura horticulture industria lechera maladie des plantes national parks oil crops organisme nuisible parc national parques nacionales pests plagas plant diseases plantas oleaginosas plante de culture zootechnie zootechny zootecnia