@book{6267,
	author = {KOLLER, ALOIS. and SIEMENS AKTIENGESELLSCHAFT.},
	title = {TRABAJO, POTENCIA, RENDIMIENTO/ },
	publisher = {MARCOMBO ; SIEMENS},
	year = {\\\\},
	series = {SER. ENSEÑANZA PROGRAMADA},
	address = {BARCELONA: }
}