Hallert, B. <br/><br/>
General differential formulae of the complete projective relations between planes 

 - Goteborg  Elanders Boktryckeri Aktiebolac  1959 
 - 14p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Geodesy
<br/><br/><label>Dewey Class. No.: </label>526.98  / H