TY  - BOOK
AU  - Duff M J Et Al
TI  - Strings '90 - Proceedings of the 4Th International Superstring Workshop
SN  - 9789814439299
PB  - World Scientific
KW  - Physics
UR  - https://www.worldscientific.com/worldscibooks/10.1142/1166#t=toc
ER  -