SACRO BOSCO, Johannes. Sphaera, Louvain: Johannes Waen, 1547. Small 8, woodcut vignette of an armillary sphere on title, numerous woodcuts illustrations (lower margin of title and A2 repaired) [bound with the same author's:] Libellus, de anni ratione, Antwerp: Martinus Nutius [n.d.]. 8, woodcut vignette on title, numerous woodcut illustrations (marginal repair to verso of title), 2 works in one volume, modern vellum (new endpapers).