Relation von der vergeblichen Belagrung der Haupt Vestung Gibraltar, 1782---(I.M. Will excud.)
WWW LC auth. file, 17/02/2006---(Will, Johann Martin, 1727-1806)
Tooley's dictionary of mapmakers, 1999-2004---T.4, p.389 (Will, Johann Martin. Engraver of Augsburg who was succeded by his son-in-law Johann Walch in 1806)
Portugal et Hispania ex Archetypo Roderici Mendez Sylvae et variis Relationibus et Chartes manuscriptis et impresiis ...---((Zu bëy J.M. Will in Augsburg)
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