【作者(必填)】Feldman, M.P., and Florida, R.  

【文题(必填)】The geographic sources of innovation:technologicalinfrastructure and product innovation in the United States.

【年份(必填)】(1994).

【全文链接或数据库名称(选填)】Annals of theAssociation of American Geographers 84:210 –29.