Manual Training Play Problems: Constructive Work for Boys and Girls Based on the Play Interest. E-book. Formato PDF William Samuel Marten   -  Forgotten Books, 2017  - 

These instances of the interest in constructive-play activities manifested by the children, which continue so forcibly to come to my attention, have been the spur which has prompted me to organize such problems in available form so that the boys and girls can con struct them at school or at home.