TY  - BOOK
ED  - UNESCO.
TI  - Statistics on science and technology: extract from Unesco Statis tical Yearbook, 1989
PY  - 1989///
CY  - Paris
PB  - UNESCO
KW  - Science and technology
KW  -  Statistics
KW  -  Yearbook
N1  - Includes bibliographical references
ER  -