Sokkia 8152-75 Cross-Section Field Book Both pages have 10 x 10 blue lines with inch lines slightly heavier. Appendix of 11 tables of conversions, trigonometric functions, and formulae for solving right angles and curves. Hardback cover, 80 leaves, page size 6 1/2” x 8 1/2”. Sokkia Weather-resistant Field Books feature: High Visibility Covers Constructed to withstand rugged handling under all climatic conditions Fine quality water-resistant ledger paper Waterproof blue and red inks