@conference{UBHD-1036845, title={Londres 1973}, year={1976}, language={spa}, isbn={3-11-005954-1 and 978-3-11-005954-0}, number={ARRAY(0x562d2f3e3168)}, series={Hacia Calderón}, library={UB [Signatur: 76 B 3027] ; RO [Signatur: RO/IO 3505 H117-3]}, }