%0 Book %T Materials for Helicopter Gears: Report %D 1979 %U https://nap.nationalacademies.org/catalog/19853/materials-for-helicopter-gears-report %> https://nap.nationalacademies.org/catalog/19853/materials-for-helicopter-gears-report %I The National Academies Press %C Washington, DC %G English %K %K Transportation and Infrastructure %P 102 %R doi:10.17226/19853