Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456 DE1359333U - - Google Patents
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Biennial Survey of Education in the United States, 1932-1934. Bulletin, 1935, No. 2. Chapter VII: Statistics of Private Commercial and Business Schools, 1932-33.