TY  - BOOK
AU  - Berhanu Shiferaw
AU  - Paulo D.Cordaro
AU  - Jorge Hounie
TI  - An Introduction to Involutive Structures
SN  - 9780521878579
U1  - 511.322 
PY  - 2008///
CY  - New York
PB  - Cambridge University Press
ER  -