Iohannes de Sacrobosco's "Tractatus de Sphæra" was written around 1230. After the developement of printing in Europe, in the 15th century, it underwent successive editions, alone or with comments and together with additional works. It was widely studied in many European universities, up to mid-17th century.
A survey describing more than 200 editions of the "Tractatus de Sphæra" can be consulted here:
http://www.ghtc.usp.br/server/Sacrobosco/Sacrobosco-ed.htm
The full text of the 1478 edition of Iohannes de Sacrobosco "Tractatus de Sphæra" can be consulted or downloaded from this address:
http://www.ghtc.usp.br/server/Sacrobosco.htm
The Latin text of the 1478 edition, together with a Portuguese translation, can be downloaded from this address:
http://www.ghtc.usp.br/server/Download/Sacrobosco-1478-trad.PDF
An edition of Sacrobosco's Tractatus de Sphaera, published in Venice in 1482 (copy of the Portuguese National Library, Lisbon).