TY - BOOK TI - The transformation of learning : advances in cultural-historical activity theory AU - Oers, B. van (Bert) SN - 9780521868921 (hardback) PB - Cambridge University Press PP - Cambridge ; New York : Cambridge University Press , 2008. PY - 2008 UR - https://library.korea.ac.kr/detail/?cid=CAT000045459731&ctype=m