【摘要】 用美国和加拿大12个代表性研究型图书馆2005-2007年的统计数据简要呈现了电子资源与纸质资源的经费开支比例。在平均纸质资源经费仍超过书刊总经费50%的同时,大多数样本图书馆的电子资源经费开支逐年增加。图1。表2。参考文献6。更多还原

【Abstract】 The proportion of electronic resources vs. paper resources is revealed by 2005-2007 statistics of 12 representatives in American and Canadian research libraries. The expenditures for electronic resources in most sample libraries increase year by year while the average expenditures for paper resources exceed 50% total library expenditures. 1 fig. 2 tabs. 6 refs.更多还原