: Sites like AbeBooks or local used bookstores often have affordable physical copies of older editions.

No.

| Book Title | Author | Best For | Access | | :--- | :--- | :--- | :--- | | | I.C. Gupta | Numerical problems | Paid (Affordable) | | A Text Book of Metrology | M. Mahajan | Basic concepts | Paid | | Engineering Metrology & Measurements | N.V. Raghavendra | Modern techniques | Paid / Library | | Fundamentals of Dimensional Metrology | Connie Dotson | Practical lab work | Paid | | NIST Engineering Metrology Toolbox | NIST (USA) | Online reference | Free (Official) |