6 Responses

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  1. karen
    karen at | | Reply

    the link is not working please help thanks

  2. Romiul Haque
    Romiul Haque at | | Reply

    Thank you.Nice work Buddy.

  3. M Sohail
    M Sohail at | | Reply

    Chang chemist is excellent work on the subject indeed.

  4. david
    david at | | Reply

    i couldnt download the text book and i need it asap

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