. . "Electron Mean Free Path"@en . "http://www.iso.org/iso/catalogue_detail?csnumber=31897"^^ . . . . . . . . . . . . . . "\"Electron Mean Free Path\" is the mean free path of electrons." . . . . . . . . . . "http://en.wikipedia.org/wiki/Thermal_conductivity"^^ . . . . . . . . . . . . . . . "l_e" . . .