Professor Kantha Lanakatilake
Basic statistics – a self learning module vol-II
Rajapakse L.C, Lankatilake KN, Seneviratne S.R.De A, Fernando D.N.Basic statistics – a self learning module vol-II. Department of Community Medicine. Faculty of Medicine, Colombo. 1997. ISBN 955-9021-08-8. first published in 1997, reprints thereafter.
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