Invariants of Quadratic Differential Forms Veblen, Oswald 9780521604840 Cambridge Tracts in Mathematics Heftet 03.06.2004 Engelsk Midlertidig utsolgt
The Foundations of Differential Geometry Whitehead, J. H. C. Veblen, Oswald 9780521066747 Heftet 03.01.1932 Engelsk Midlertidig utsolgt