Elan Publishing Level Book Pocket Size 64-64M

Designed to meet the needs of the on-the job professional. Field book covers are heavy duty, extra stiff easy to locate Orange color to protect against the weather or other adverse conditions. Pages are printed in waterproof inks on heavy, 50% cotton-content ledger paper. 4 1/8" x 6 1/5" 80 leaves, 160 pages, plus 16 page index & tables. Ruled light blue with red vertical lines. Grid layout for right and left pages: 6 vertical columns. Appendix of 11 tables of conversion, trigonometric functions, and formulae for solving right angles and curves