【作者(必填)】Carsten Burhop and Nikolaus Wolf

【文题(必填)】The German Market for Patents during the “Second Industrialization,” 1884–1913: A Gravity Approach
【年份(必填)】Published online by Cambridge University Press:  16 May 2013

【全文链接或数据库名称(选填)】https://www.cambridge.org/core/j ... 6937724B2BD2A1EE8C3