Kitabu hiki huenda hakitapatikana katika uchapishaji.
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56 pages, illustrated, tables
Maelezo ya Uchapishaji
- Limechapishwa: 1976
- Mchapishaji: Mennonite Central Committee
- Dewey Decimal: 597.005
- Maktaba ya ECHO: 597.005 YAN
56 pages, illustrated, tables