00275nam a2200097Ia 4500008004100000082001900041100001600060245006500076260002800141300000800169140113s9999    xx            000 0 und d  a591.131.2   L4  aFranz. H.G.  aThe functional response to prey density in an acarine system  a1975bPUDOCcWageningen  a143