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Are you Hubertus L.L. Busard, author of the books below?
Der Tractatus Proportionum von Albert von Sachsen (Denkschrif... by Hubertus L.L. Busard Der Traktat de Sinibus, Chordis et Arcubus von Johannes von G... by Hubertus L.L. Busard Robert of Chester's (?) Redaction of Euclid's Elements, the S... by Hubertus L.L. Busard Der Traktat de Sinibus, Chordis et Arcubus von Johannes von G... by Hubertus L.L. Busard


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