@Article{npg-11-411-2004, AUTHOR = {Thejappa, G. and MacDowall, R. J.}, TITLE = {High frequency ion sound waves associated with Langmuir waves in type III radio burst source regions}, JOURNAL = {Nonlinear Processes in Geophysics}, VOLUME = {11}, YEAR = {2004}, NUMBER = {3}, PAGES = {411--420}, URL = {http://www.nonlin-processes-geophys.net/11/411/2004/}, ISSN = {1023-5809} }