Spangenberg, Leonard.2014-12-152014-12-1519341934b1463224xhttps://archive.org/details/causeeffectofbus00spanhttps://hdl.handle.net/2144/10217Thesis (M.B.A.)--Boston Universityen-USBased on investigation of the BU Libraries' staff, this work is free of known copyright restrictions.Thesis/Dissertation