Unit cost in a selected group of high school libraries
| Hlavní autor: | |
|---|---|
| Médium: | Kniha | 
| Jazyk: | English | 
| Vydáno: | 
        [Washington
          U. S. Govt. Print. Off.]
    
        [1942]
     | 
| Edice: | Bulletin 1941 U. S. Office of Education
              no. 11             | 
| Témata: |