Jenkins, G.K. & Kromann, Anne, Sylloge Nummorum Graecorum: Spain - Gaul, The Royal Collection of Coins and Medals Danish National Museum, Copenhagen, 1979, 39 fine plates with text, softcover, the Copenhagen SNG volumes are indispensable. It is the largest and most complete of all SNG 's and it utilized extensively by both scholars and the trade. The coverage is extensive and both the quality of material as well as the research is very good.
Estimate: 30-50 USD