सुमन (Suman) भाषा विज्ञान के सिद्धान्त Bhasha vijnan ke sidhanth - Lucknow Navachethana prakasan 1965 - 246p. Subjects--Topical Terms: Official languageBhasha vijnanभाषा विज्ञान Dewey Class. No.: 811(H)'1 / SUM/B