00614nam0-2200241 --450 991046905790332120230622153201.020210504d1969----kmuy0itay5050 baspaES 001yyErasmoGeorge UscatescuMadridEditora Nacional1969243 p.21 cm.EnsayoUscatescu,George11273ITUNINAREICATUNIMARCBK9910469057903321DFT A91.17 ERAD/S 012021/815FLFBCFLFBCErasmo308716UNINA