科技情报以各种情报的形式存在,各种情报源都有自己的特点与适用范围,我曾经从使用效果出发对我国机械与化工方面一些重大科研成果的研制单位作过一次全国性调查,根据调查结果,对各种情报源的使用价值进行了综合评价,发现其重要性有如下排列:外文期刊——专利文献——样品——技术挡案图纸——样本——研究报告——文摘——会议文献——技术标准——外文图书——学位论文——中文期刊——科技电 All kinds of intelligence sources have their own characteristics and scope of application. I once conducted a nationwide survey on the development of some major scientific research achievements of China's machinery and chemical industries from the perspective of the use effect. According to The results of the survey conducted a comprehensive evaluation of the use value of various intelligence sources and found that their importance is as follows: Foreign Journal - Patent Literature - Sample - Technical Bills Drawing - Sample - Research Report - Digest - Journal of Academic Library and Information Science. Journal of Academic Library and Information Science