यो Book आफ्नो भाषा मा अवस्थित छैन, हेर्नुहोस्: English (en),
अथवा गुगल अनुवाद प्रयोग:  

This book may no longer be available in print.

40 pages, illustrated

Publication Details

  • Publisher: Engineers Without Borders
  • Dewey Decimal: 683.8
  • ECHO Library: 683.8 SOU