International standard classification of occupations codes and titles of major, minor and unit groups together with draft definitions and alphabetic index.
| निगमित लेखक: | |
|---|---|
| स्वरूप: | पुस्तक |
| भाषा: | English |
| प्रकाशित: |
Geneva
[s.n.]
1957.
|
| विषय: |