1. Plant Viruses and Virus Diseases;Bawden,1964
2. Physiology of virus-infected plants;Diener;Ann. Rev. Phytopathol.,1963
3. Atrophy of nodular system in the virus-infected groundnut, Arachis hypogaea L;Hargopal;Curr. Sci.,1976
4. Sixteen groups of plant viruses;Harrison;Virology,1971
5. Determination of nitrogen;Humphries,1956