M. Mahajan's Statistical Quality Control and Metrology books are staple resources for mechanical and production engineering students, typically covering fundamental measurement principles, gauges, and quality management systems.
University Repositories: Many engineering colleges list Mahajan’s textbooks in their Digital Libraries or open-access syllabus guides. mmahajanmetrologyebookdownload+exclusive
Surface Roughness (Ra, Rz values): Exploring how the "Cut-off length" affects the measurement of surface finish. Legally purchase the official eBook (₹500 approx)