NLM LitArch Open Access Subset

A subset of the total collection of books and documents in the NLM Literature Archive (NLM LitArch), accessible through the Bookshelf website, are available through the NLM LitArch Open Access subset. Contents in the NLM LitArch Open Access subset generally include works which are in the public domain, works which are available under a Creative Commons or similar license, and works whose authors or publishers have explicitly agreed to the terms of the NLM LitArch Open Access subset. Except for public domain works, works in the NLM LitArch Open Access subset are still protected by copyright, but are made available under a Creative Commons or similar license that generally allows more liberal redistribution and reuse than a traditional copyrighted work. The license terms are not the same for each work. Read the license text which is available with each downloadable file to determine terms of use.

NLM 文献档案（NLM LitArch）中总藏书和文献的子集，可通过Bookshelf网站访问，均可在NLM LitArch Open Access子集中获取。NLM LitArch Open Access子集中的内容通常包括进入公共领域的作品、受Creative Commons或类似许可协议保护的作品，以及作者或出版商明确同意NLM LitArch Open Access子集条款的作品。除公共领域作品外，NLM LitArch Open Access子集中的作品仍受版权保护，但根据Creative Commons或类似许可协议提供，这些许可协议通常比传统版权作品允许更自由地再分配和再利用。每部作品的许可条款均不相同。请阅读与每个可下载文件一起提供的许可文本，以确定使用条款。