Johannes Engel
... that between 1489 and 1491, the doctor and astronomer Johannes Engel worked as a proofreader for the printer Erhard Ratdolt of Augsburg?
... that between 1489 and 1491, the doctor and astronomer <b id="mwB1o"><a href="./Johannes_Engel" id="mwB1s" rel="mw:WikiLink" title="Johannes Engel">Johannes Engel</a></b> worked as a <a href="./Proofreading" id="mwB1w" rel="mw:WikiLink" title="Proofreading">proofreader</a> for the printer <a href="./Erhard_Ratdolt" id="mwB10" rel="mw:WikiLink" title="Erhard Ratdolt">Erhard Ratdolt</a> of <a href="./Augsburg" id="mwB14" rel="mw:WikiLink" title="Augsburg">Augsburg</a>?