?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Jones&rft.aufirst=Gillian+Wendy.&rft.au=Jones%2C+Gillian+Wendy.&rft.tpages=212&rft.degree=Doctoral&rft.inst=Institute+of+Education%2C+University+of+London&rft.date=1987&rft.title=An+investigation+into+children's+acquisition+of+the+notion+of+place-value