Rao, P. S. S. Sundar. Introduction to biostatistics and research methods / Biostatistics. P.S.S. Sundar, J. Richard. - 5th ed. - New Delhi : PHI Learning, 2012. - xii, 268 p. ; 24 cm. 'Eastern economy edition'--Cover. ISBN: 9788120345201 RM49.90 8120345207 Subjects--Topical Terms: Biometry.Medical statistics.