building blocks of economic complexity
Proceedings of the National Academy of Sciences - PNAS, 2009-06, Vol.106 (26), p.10570-10575 [Peer Reviewed Journal]Copyright National Academy of Sciences Jun 30, 2009 ;ISSN: 0027-8424 ;EISSN: 1091-6490 ;DOI: 10.1073/pnas.0900943106 ;PMID: 19549871
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