Houghton Monogram 444.3 (nmo:Monogram)
- URI
- http://numismatics.org/sco/symbol/monogram.houghton.444_3
- Monogram 444.3 from Houghton, Lorber, and Hoover, Seleucid coins : a comprehensive catalogue (2008). The monogram contains Π and Ρ as identified by Peter van Alfen. (en)
- http://numismatics.org/sco/symbol/monogram.houghton.444
- Π and Ρ
- http://nomisma.org/id/greek_numismatics
- http://nomisma.org/id/seleucid_coins
