"Schröder, Johann Anton (Germ.). Warden of the Mint at Zellerfeld, and later Mint-master at Hanover, and Neuhaus near Paderborn, 1751-1777. His initials A.S. or I.A.S. occur on his issues; also on Conv. Thalers and Gulden of Wilhelm Anton, baron von der Asseburg, bishop of Passau, 1795; Thaler 1761 of Friedrick Carl of Holstein (Wolff, Die Münze zu Hannover, Blätter für Münzfreunde, 653)" - Forrer, L. "Biographical dictionary of Medaillists", Bd. 5 (London 1912), S. 404
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