. . . . . . . . . . . . . "General equations for the motions of ice crystals and water drops in gravitational and electric fields" . . "General equations for the motions of ice crystals and water drops in gravitational and electric fields"@en . . . . . . . . . . "Water." . . "Ice." . . "Electric fields." . . "Equations of motion." . . "Gravitational fields." . . "Crystals." . . "Drops (Liquids)" . . . . "Institut d'AĆ©ronomie Spatiale de Belgique <Bruxelles>" . .