Semaine d'etude sur le theme l'emploi des fertilisants et leur effet sur l'acroissement des recoltes, notamment par rapport a la qualite et a l'economie. study week on use of fertilizers and its effect in increasing yield with particular attention to quality and economy.

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Pontificia Academia Scientiarum, Vatican City, 1973

2 volumes. 24 cm. original stiff wrappers. 1424 pp. ills, diagrams. references. Most texts in english, some french, some german. "Scripta Varia". -(slightly stained, otherwise good).