Links

1. JCR (ZPZG Search) - http://crg.postech.ac.kr/zpzg.htm

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2. Nature Index Tables - Link

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3. pKa Tables - https://organicchemistrydata.org/hansreich/resources/pka/

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4. pKa Values in Non-Aqueous Solvents - https://analytical.chem.ut.ee/HA_UT/