Gravestones -- See Sepulchral monuments Here are entered works on funerary monuments and gravestones. Works on tombs and mausoleums, mainly from the archaeological standpoint, are entered under Tombs. General works on cemeteries and burying-grounds are entered under Cemeteries. --subdivision Tomb under names of individual persons; and subdivision Tombs under classes of persons, names of individual families, royal houses, dynasties, etc.
Graveyards -- See Cemeteries Here are entered general works on cemeteries and burying-grounds. Works on tombs and mausoleums, mainly from the archaeological standpoint, are entered under Tombs. Works on funerary monuments and gravestones are entered under Sepulchral monuments.
Gravitational Radiation -- See Gravitational waves Here are entered works on hypothetical waves predicted by the general theory of relativity that are created by disturbances of matter and travel through space at the speed of light propagating gravitational fields. Works on waves in a fluid medium that are generated by the force of gravity, such as those between air and water at an ocean's surface or between layers of air in the Earth's atmosphere, are entered under Gravity waves.