Masani, N. J. “Simple Calculations in the Design of Forest Bridges of Stock Spans of 15, 20, 30 and 40 Feet - Part V ( a ) (Graphical Method)”. Indian Forester, vol. 77, no. 1, Jan. 1951, pp. 28-54, doi:10.36808/if/1951/v77i1/23276.