@book{e34f87b8637a49b5bd873d4cbd89192e,
title = "Biophysical limits to global food production.",
author = "{Penning de Vries}, F.W.T. and {van Keulen}, H. and R. Rabbinge and J.C. Luyten",
year = "1995",
language = "English",
publisher = "IFPRI",
address = "United States",
}