Royal Botanic Gardens, Kew
Adapting Agriculture to Climate Change Project, Legume researchers, ILDON (International Legume Database on Nodulation), BRAHMS (Botanical Research and Herbarium Management database), Astragalus, ILDIS (International Legume Database and Information Service), Legumes, Advances in Legume Systematics 12, Leguminosae, Sixth International Legume Conference 2013, Legume systematics, Tom Corby, LOWO (Legumes of the World Online), William 'Bill' Fred Mahler, Fabaceae, Seed collecting guides, and Frances K. Kupicha