Hovy, Jan Willem Herman2015-08-062015-08-062015-08-06http://hdl.handle.net/10539/18197Dissertation presented for the DEGREE OF PHIL0SOPHIAE DOCTOR In the University of the Wltwatersrand, Johannesburg. August 1949enNematodaNematoda--Biological controlNematoda--ResearchExperiments on the control of eelworm (Heterodera marioni) by means of oligodynamic action of silver ions microficheThesis