Tippett, L. H. C. (November 1954). "Statistics in Research and Management in the Cotton Industry". The Incorporated Statistician. 5 (3). The Incorporated Statistician, Vol. 5, No. 3: 147–159. doi:10.2307/2986646. JSTOR2986646.
Tippett, L. H. C. (November 1954). "Statistics in Research and Management in the Cotton Industry". The Incorporated Statistician. 5 (3). The Incorporated Statistician, Vol. 5, No. 3: 147–159. doi:10.2307/2986646. JSTOR2986646.