Matsumoto, S, 'Waika disease, a new virus disease of the rice plant in Japan', vol. 7 pages, Paper presented at the IRRI Saturday Seminar, Plant Pathology Department, May 24, 1975. IRRI. 7 p, 1975
Crivello, G.; Morrow, V.; Wilson, E. Technical Note 26. Young Lives Longitudinal Qualitative Research: A Guide for Researchers. Young Lives, Department of International Development at the University of Oxford, Oxford, UK (2013) 26 pp