"Schepp, Johann Christoph (Germ.). Mint-engraver at Diez, Cassel, and Hanau, 1749-1770" - Forrer, L. "Biographical Dictionary of Medallists", Bd. 5 (London 1912), S. 380
en
"Schepp, Johann Christoph (Germ.). Mint-engraver at Diez, Cassel, and Hanau, 1749-1770" - Forrer, L. "Biographical Dictionary of Medallists", Bd. 5 (London 1912), S. 380
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