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  1. 18 maj 2012 · for GC-MS EI Fragmentation the GMD libary is the best, which are free available. Have look to partner labs, usually they use NIST.

  2. Here’s how you can start downloading free eBooks today: Search: Use the powerful search bar to find books by title, author, ISBN, or subject. Select: Choose from formats such as PDF, EPUB, or MOBI. Download: Click the “Download” button next to your chosen book and start reading instantly.

  3. NIST23 now available! A library of 180K chemical compounds analyzed by gas chromatography, including 492K GC method and retention index citations from literature. Supersedes the 2020 version. Main capabilities: Search for compounds based on name, synonym, CAS number, chemical formula, elements present, fragment name, or retention index range.

  4. PDF Drive is a free service to download educational and recreational PDF books. Users can search for their desired topic, download and read it online or offline.

  5. WorldCat.org is a global catalog of library materials. You can search for books, music, video, articles and much more at libraries near you.

  6. WorldCat gives people the ability to view library collections from anywhere in the world, giving them access to a rich assortment of information much deeper than what can be found through a basic internet search.

  7. While Libgen is often touted as a go-to for academic texts, its collection spans a vast array of genres including fiction, non-fiction, scientific articles, comics, and more. The platform hosts millions of documents, making it one of the most comprehensive free libraries on the web.

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