This paper introduces a series of authoritative and practical forestry information resources from the Internet with retrieving methods.

本文分类介绍了因特网一系列具有权威性和实用性的林业信息资源及其检索方法。

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The aim of BNF (British National Formulary) for Children is to provide a practical, relevant and authoritative information source for all health professionals involved in the drug therapy of children.

BBC: NEWS | Health | Doctors get child medicines help