TY  - GEN
AU  - Green, M.[et.al.], ed.
TI  - Superstrings'89 : proceedings of the trieste spring school 3-14 April 1989
SN  - 981-02-0138-9
PY  - 1990///
CY  - Singapore
PB  - World Scientific
KW  - PHYSICS-SOLID STATE
ER  -