Kumar,Ranjit Research Methodology : A step by step Guide for Beginners / by Ranjit Kumar - 2nd ed. - Noida: Pearson, 2020. - xix,332p. ISBN: 9788131704967 Subjects--Topical Terms: Blind studies cohort studies Computer ScienceResearch Design Dewey Class. No.: 001.42 / KUM/R