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There are many Certified Reference Materials (CRMs) operated worldwide. You will find a large share of them in our database. Try and browse our database, it is free to use. Found a suitable material? Please contact its provider directly for further info.
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Quick help for your query
Searching in the COMAR database is easy, if you understand how it works. The basics are:
Start | Go to the COMAR database.
Register | We require your registration to understand whom we reach. It's quick and easy.
Search | Make any selection. Click the button [+] to confirm. If there is no [+], click the button "Apply filter".
Logical operators | You'll see A / N / O. They mean: AND, NOT, OR.
Help | Please read our helpfile. The basics are simple.