Demmel, M.;Auernhammer, H., Development and concentration of farms in the agriculture of the Federal Republic of Germany (Germany in boarders of 1989, statistical yearbooks, added by projections of NEANDER 1986). AgTecCollection: FG Technik im Pflanzenbau TUM / Auernhammer, TU München 2015,https://mediatum.ub.tum.de/1253803