Expression of rasas in the poems of Vallathol: a psychological study (വളàµà´³à´¤àµà´¤àµ‹à´³àµâ€à´•àµà´•à´µà´¿à´¤à´¯à´¿à´²àµ† രസാവിഷàµà´•àµà´•à´¾à´°à´‚(മനഃശാസàµà´¤àµà´°à´ªà´°à´®à´¾à´¯ ഒരൠപഠനം)
