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当今世界上最负盛名、应用最广泛的文摘性检索刊物——美国《化学文摘》(简称CA),自1907年创刊以来的90年间,不论从出版周期到类目设置,还是从文摘著录格式到索引的编排使用,都在不断地更新、调整,使其更加完善,以满足广大检索者的需要。现将CA近年来出现的新变化,罗列如下,供大家参考。1 80大类由原来的单、双号期交替报导改为每期报道
The most prestigious and widely used digest search publication in the world today - the United States “Chemical Abstracts” (CA), since the beginning of 1907 90 years, both from the publication cycle to the category set, or from the abstracts format The use of indexing arrangements, are constantly updated, adjusted to make it more perfect to meet the needs of the majority of searchers. Now CA new changes in recent years, are listed below, for your reference. 1 80 categories from the original single and double numbers alternately reported to each report