Joannes de Sacrobosco et al, Noviciis adolescentibus: ad astronomicam rempu. capessendam aditum impetrantibus. Venice: Erhard Ratdolt, 1485. (sig. [1]2r)
Library of Congress, QB144 .S643 1485 Copy 2 (public domain)
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Joannes de Sacrobosco et al, Noviciis adolescentibus: ad astronomicam rempu. capessendam aditum impetrantibus. Venice: Erhard Ratdolt, 1485. (sig. [1]2r)
Library of Congress, QB144 .S643 1485 Copy 2 (public domain)