A. P. · W.A. · W.P. · Walter A.
Dover Publications · McGraw-Hill
| title | ISBN-13 (ISBN-10)  | year of publication | 
|---|---|---|
| Differential Geometric Structures | 978-0-486-45844-1 (0-486-45844-X)  | 2007 | 
| Differential geometric structures | 978-0-07-050435-6 (0-07-050435-0)  | 1981 |