Townsend, E. (1871). An easy proof of the "prismoidal formula", with an accurate method of taking out the quantity of earth, and of setting out the "half-breadths" in a cutting with a steep gradient.
Lua i Stíl Chicago (17ú heag.)Townsend, Edward. An Easy Proof of the "Prismoidal Formula", with an Accurate Method of Taking Out the Quantity of Earth, and of Setting Out the "Half-breadths" in a Cutting with a Steep Gradient. 1871.
Lua MLA (9ú heag.)Townsend, Edward. An Easy Proof of the "Prismoidal Formula", with an Accurate Method of Taking Out the Quantity of Earth, and of Setting Out the "Half-breadths" in a Cutting with a Steep Gradient. 1871.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
