| 其他書名 | A Repetition of the Study Made by John E. Grinnell at the University of Minnesota in 1925, Together with a Summary of a Questionnaire on School Publicity Sent to the Superintendents of Minnesota |
| 出版 | University of Minnesota, 1930 |
| URL | http://books.google.com.hk/books?id=LsxeetEdFBEC&hl=&source=gbs_api |