Ioannis Kepleri ... Narratio de observatis a se quatuor Iouis satellitibus erronibus, quos Galilaeus Galilaeus ... Medicaea sidera nuncupauit, etc.
Keppler, Johann.
Francofurti :  Sumptibus Z. Palthenii, 
1611.
The first six leaves only, part of the preface.