Auernhammer, H., Yield maps in contour shape (left) and grid shape (right) (Scheyern, Flachfeld 17.1 ha, SEL-GLOBOS DGPS, DATAVISION-FLOWCONTROL, August 12 & 13 1991),  . AgTecCollection: FG Technik im Pflanzenbau TUM / Auernhammer, TU München 2015,https://mediatum.ub.tum.de/1238733