Joseph Hooker's Rhododendrons of Sikkim-Himalaya - Hooker, Joseph Dalton 1817-1911 (Kew Publishing, Royal Botanic Gardens, Kew, 2017)
Facsimile edition reproduced from an original which was published in three parts by Reeve, Benham & Reeve, London, between 1849 and 1851, and is held in the Library, Art & Archives of the Royal Botanic Gardens, Kew