Show 10 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: author="OTTENGRAF, S" or (type exact bookEditor and editor="OTTENGRAF, S") Add to list Journal Article A1 THE USE OF MICROSENSORS TO DETERMINE POPULATION-DISTRIBUTIONS IN UASB AGGREGATES. P LENS, D DEBEER, C CRONENBERG, S OTTENGRAF and Willy Verstraete (UGent) (1995) WATER SCIENCE AND TECHNOLOGY. 31(1). p.273-280