A key to Alexander Graham Bell's experiments was one of these, procured by a doctor friend, Clarence Blake
I procured a skull 
and ..... At this time Bell enjoyed the friendship of Dr. Clarence J. Blake, an 
eminent... [DOC] [TLE] telefone com diapaso: uma das patentes de alexander graham bell [PAR] 12 nov. 2009 ... A referncia [1] foi encontrada atravs de uma busca no website ..... inventou o 
primeiro telefone: embora Alexander Graham Bell tenha ......