TY - BOOK T1 - Geographical diffusion theory T2 - Northwestern University Studies in geography A1 - Hudson, John C. LA - English PP - Evanston, Illinois PB - Department of Geography,Northwestern University YR - 1972 UL - https://ds.mainlib.upd.edu.ph/Record/UP-99796217601725791 OP - 179 CN - GN 320 H82 KW - Culture diffusion. ER -