01012nam0-22002891i-450-990001109920403321981-02-0372-1000110992FED01000110992(Aleph)000110992FED0100011099220000920d1991----km-y0itay50------baengString Theory and Quantum GravityProceedings of the ICTP Trieste Spring School 23 April - 1 May 1990edited by M. GreenSingapore [etc.]World Scientific1991In testa al front.: International Centre for Theoretical Physics - International Atomic Energy Agency - United Nations Educational, Scientific and Cultural Organization.Scuole di fisica530.143Green,M.348041ITUNINARICAUNIMARCBK99000110992040332122B-022.03018507FI1FI1String Theory and Quantum Gravity337894UNINAING01