1. Foundation of potato ridge riddling experiments;Palmer;SIAE Departmental Note SSN/154,1974
2. First results of laboratory experiments on the separation of soil on reciprocating sieves;Baganz,1957
3. Riddling performance of separating elements of potato harvesters in the field;Noack,1959
4. Preliminary results of acceleration measurements on potato harvester elevator chains;Noack;Dt. Agrartech.,1964
5. Separation of soil in potato harvesters with endless elevator chains (first results);Baader;NIAE translation 116 from Landtech. Forsch.,1961