Gerlach, Rudolf. <br/><br/>
Die Metrik in projektivischen Koordinaten. 

 - Zürich,  1899. 
 - xii, 114 p.  diagrs.  23 cm. 
<br/><br/>Inaug.-Diss.--Zürich. 
<br/><br/><label>LCCN: </label>g  01002138 //r852 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coordinates.
<br/><br/><label>LC Class. No.: </label>QA556  / .G3