#1
Species vs. yr
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#2
Year vs. systematics
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#3
Year vs. geography & author Plot
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#4
Birds vs. mammals (1)
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#5
Birds vs. mammals (2)
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#6
Pattern of activity 1790-1815
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#7
Pattern activity of in the top four Journals
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#8
Survival analysis of rates of description

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#9
Rates of Description in Sherborn's Index Animalium [2011.12.25]