Figure 2 from: Dickinson EC (2016) Reinforcing the foundations of ornithological nomenclature: Filling the gaps in Sherborn's and Richmond's historical legacy of bibliographic exploration. In: Michel E (Ed.) Anchoring Biodiversity Information: From Sherborn to the 21st century and beyond. ZooKeys 550: 107–134. https://doi.org/10.3897/zookeys.550.10170

Figure 2 - Bibliographic publications per decade, 1970 to late 2011, by subject. Treating books, periodicals and general works such as catalogues (source: references cited by Dickinson et al. 2011).