landslide scarlandslide shear surfacelandslide terracelandslide tracklandslide victorylandslideslandslidinglandsliplandslipelandspoutlandsteiner’s classificationlanduselanelane control signallane control systemlane departure warninglane grouplane international roughness indexlane linelane narrowinglane numberinglane occupancylane onelane separatorlaned downlanerlaneslanewaylanglang time no seelangaroudlangelier index langelier's indexlangelier saturation indexlangerlanger’s lineslangerhanslangerhans’ cellslangevinlangevin dynamicslangevin functionlangmuir equationlanguagelanguage acquisitionlanguage acquisition devicelanguage acquistionlanguage acquistion devicelanguage acquistion theorieslanguage agnosticlanguage artslanguage arts class