Bhatt, N. D.
Elementary Engineering Drawing Plane and Solid Geometry - 49 ed. - India Charotar Publishing House 2006 - P.600
8185594589
Sheet Layot Pencil Drawings Conic section Auxiliary Planes
742 B51E
Elementary Engineering Drawing Plane and Solid Geometry - 49 ed. - India Charotar Publishing House 2006 - P.600
8185594589
Sheet Layot Pencil Drawings Conic section Auxiliary Planes
742 B51E