By Cohen H. Floris   in Annals of Science

ISSN:1464-505X|44|5|471-488

Taylor & Francis Ltd‎(1987)‎

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By Cohen H. Floris   in Journal of Economics

ISSN:0931-8658|83|3|293-296

Springer Publishing Company ‎(2004)‎

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By Cohen H. Floris   in Early Science and Medicine

ISSN:1573-3823|17|3|339-350

Brill‎(2012)‎

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