Update README.md

README.md

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 # Of waves and peas: Accepting the null across scientific history
 ## Richard D. Morey (richarddmorey@gmail.com) and Saskia Homer (HomerSE@cardiff.ac.uk)
 
+* PDF version of the text:
+https://github.com/richarddmorey/nullHistoryAMPPS/blob/master/papers/Rpaper1/text/papaja_paper/paper_pdf.pdf
+
 * Data from Michelson & Morley ([1887](https://en.wikisource.org/wiki/On_the_Relative_Motion_of_the_Earth_and_the_Luminiferous_Ether)):
 https://github.com/richarddmorey/nullHistoryAMPPS/blob/master/papers/Rpaper1/figures/data/MM_data_1887_data.txt
 
 * Data from Mendel ([1866](http://www.esp.org/foundations/genetics/classical/gm-65.pdf), as compiled by Edwards, [1986](http://onlinelibrary.wiley.com/doi/10.1111/j.1469-185X.1986.tb00656.x/abstract)):
 https://github.com/richarddmorey/nullHistoryAMPPS/blob/master/papers/Rpaper1/figures/data/mendel_edwards_1986.txt
 
-* PDF version of the text:
-https://github.com/richarddmorey/nullHistoryAMPPS/blob/master/papers/Rpaper1/text/papaja_paper/paper_pdf.pdf