"Plankton-Bar - Tonolli (1951)"@en . . "SDN:L22::NETT0140" . "A device for continuously sampling plankton from several depths simultaneously using a combination of ~18 cm diameter nets with 38 meshes per cm and a pumping system. Five nets with equidistant spacing on a towing wire were normally used [Wiebe and Benfield 2003 Plate 11 D]."@en . .