Matches in DBpedia 2014 for { ?s ?p <http://books.google.com/books?id=fZCJUI0UMDUC&pg=PA68&lpg=PA68&dq=al+helfer&source=web&ots=-aFMOoNQQL&sig=CAYFPHZX5revbd8EBvO-yUTfAt8#PPA69,M1> . }
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