Kothari, C R. Research methodology : Methods and techniques / by C R Kothari AND Gaurav Garg - 4th ed. - New Delhi: New Age International Ltd. Publishers, 2020. - xxi, 458p. ISBN: 9789386649225 Subjects--Topical Terms: ResearchResearch designResearch methodologyResearch problem Dewey Class. No.: 001.42 / KOT/R