Understanding cognitive development: Different stages and Piaget’s theory

What is cognitive development? Expert Dr Samantha Durrant answers parents' questions around this tricky subject, and how it ...
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American national standard for permanence of paper for publications and documents in libraries and archives / approved October 26, 1992 by the American National Standards ...

Cover title: American national standard--Permanence of paper for publications and documents in libraries and archives. Rev. ed. of: American national standard for information sciences--Permanence of ...