. . "The engine indicator, its design, theory and special applications" . . . . "The engine indicator; its design, theory and special applications" . . "˜Theœ engine indicator its design, theory and special applications" . . "The engine indicator its design, theory and special applications"@en . . . . . . "The engine indicator : its design, theory and special applications"@en . . . "The engine indicator"@en . . . . "The engine indicator : Its design, theory and special applications" . . . .