Weidauer

Weidauer, Lisa.  Problemeder frühen Elektronprägung, Typos I, Office du Livre. (Fribourg, 1975)

Lisa Weidauer's 1975 book Probleme der frühen Elektronprägung (Problems in Early Electrum Coinage) is one of the standard references, frequently used in coin attributions, for what are arguably the world's first coins. The text is in German but a project to translate it into English is discussed here:  http://www.forumancientcoins.com/board/index.php?topic=57442.0

Weidauer

Weidauer, Lisa.  Problemeder frühen Elektronprägung, Typos I, Office du Livre. (Fribourg, 1975).

Lisa Weidauer's 1975 book Probleme der frühen Elektronprägung (Problems in Early Electrum Coinage) is one of the standard references, frequently used in coin attributions, for what are arguably the world's first coins. The text is in German but a project to translate it into English is discussed here:  http://www.forumancientcoins.com/board/index.php?topic=57442.0