Plantae Preissianae, sive, Enumeratio plantarum quas in Australasia occidentali et meridionali-occidentali annis 1838-1841 collegit Ludovicus Preiss, 1844-1847 t.p. (Christianus Lehmann, M. et Ph.D., Hist. Nat. Prof.)
OCLC, 23 Jul. 2009 (hdg.: Lehmann, Johann Georg Christian, 1792-1860)
Wikipedia, 23 Jul. 2009 (Johann Georg Christian Lehmann (25 February 1792--12 February 1860), German botanist)
BL database, 23 Jul. 2009 (hdgs.: Lehmann, Johann George Christoph [sic]; Lehmann, Johann Georg Christian)