Fisher, Ronald A. (1921). ") Studies in Crop Variation. I. An Examination of the Yield of Dressed Grain from Broadbalk". Journal of Agricultural Science. 11 (2): 107–135. doi:10.1017/S0021859600003750. hdl:2440/15170. S2CID86029217.
Fisher, Ronald A. (1923). ") Studies in Crop Variation. II. The Manurial Response of Different Potato Varieties". Journal of Agricultural Science. 13 (3): 311–320. doi:10.1017/S0021859600003592. hdl:2440/15179. S2CID85985907.
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Fisher, Ronald A. (1921). ") Studies in Crop Variation. I. An Examination of the Yield of Dressed Grain from Broadbalk". Journal of Agricultural Science. 11 (2): 107–135. doi:10.1017/S0021859600003750. hdl:2440/15170. S2CID86029217.
Fisher, Ronald A. (1923). ") Studies in Crop Variation. II. The Manurial Response of Different Potato Varieties". Journal of Agricultural Science. 13 (3): 311–320. doi:10.1017/S0021859600003592. hdl:2440/15179. S2CID85985907.
Cauchy, Augustin Louis (1821). Cours d'analyse de l'École royale polytechnique [Analysis course at the Royal Polytechnic School] (in French). Imprimerie royale. OL6477125M.[page needed]
Fisher, Ronald A. (1921). ") Studies in Crop Variation. I. An Examination of the Yield of Dressed Grain from Broadbalk". Journal of Agricultural Science. 11 (2): 107–135. doi:10.1017/S0021859600003750. hdl:2440/15170. S2CID86029217.
Fisher, Ronald A. (1923). ") Studies in Crop Variation. II. The Manurial Response of Different Potato Varieties". Journal of Agricultural Science. 13 (3): 311–320. doi:10.1017/S0021859600003592. hdl:2440/15179. S2CID85985907.