TY - BOOK AU - Duff, Jon M. TI - Engineering design and visualization SN - 9788131512579 U1 - 620.0042 DUF PY - 2009/// CY - New Delhi PB - Cengage Learning KW - Spatial sketching KW - 3D modeling KW - Orhtographic sketching KW - Isometric sketching KW - Fabrication sketching ER -