R (>= 2.7.2), methods, statmod, lattice, MASS
R (>= 2.9), methods, statmod, lattice, MASS
R (>= 2.9.0), methods, statmod, lattice, MASS
R (>= 2.9.1), methods, statmod, lattice, MASS
R (>= 2.9.2), methods, statmod, lattice, MASS