TY  - BOOK
AU  - Arnold, A.
AU  - Colloquium on Trees in Algebra and Programming. Copenhagen 1990
TI  - CAAP '90
T2  - Lecture notes in Computer Science, 431
SN  - 3540525904
U1  - 005.13 
PY  - 1990///
CY  - Berlin
PB  - S-V
ER  -