Perera, P.E.G. ...[et al.] comp.
Pessum karanaya - Rajagiriya National Apperentice and Industrial Training Authority 1999 - 66p. : ill.
Text in Sinhala
WELDING
621.791 / P3
Pessum karanaya - Rajagiriya National Apperentice and Industrial Training Authority 1999 - 66p. : ill.
Text in Sinhala
WELDING
621.791 / P3