. . . . "Engineering descriptive geometry the direct method for students, draftsmen, architects, and engineers"@en . . "Engineering descriptive geometry : the direct method for students, draftsmen, architects, and engineers"@en . "Engineering descriptive geometry : the direct method for students, draftsmen, architects, and engineers" . . . "Engineering descriptive geometry, the direct method"@en . . . . . . . . . . . . . . . . . . "Engineering descriptive geometry; the direct method for students, draftsmen, architects, and engineers" . "Engineering descriptive geometry; the direct method for students, draftsmen, architects, and engineers"@en . . . . . . . . . . . . . . "Géométrie descriptive." . . "Geometria Descritiva." . . "Geometry, Descriptive." . . "Engineering drawings." . . "Geometria descriptiva." . . "Orthographic projection." . . . .