Sumner, Helen2016-10-202016-10-2019361936b1473459x(OCoLC)07874653(OCoLC)ocm07874653https://hdl.handle.net/2144/18363Thesis (M.A.)--Boston University, 1936. This item was digitized by the Internet Archive.en-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictionsDevising a method for the study of the overt selfishness of nursery school childrenThesis/Dissertation