TY  - BOOK
AU  - Hendriks,Harrie
TI  - Obstruction theory in 3 - Dimensional topology: an extension theorem
T2  - Report 7617
AV  - MATH QA3.R46 no.7617 
PY  - 1976///
CY  - Nijmegen
PB  - Catholic University, Department of Mathematics
KW  - Obstruction theory
KW  - Topology
KW  - Three-dimensional display system
N1  - Includes bibliographical references
ER  -