Gradient-to-Cooling ratio
Governmental » NASA
G.R.I. - G.T.M.A.A. - G.T.T.B.A. - G.W.S - G/A - g/dl - G/E - G/F - G/G - G/S - G/T - G/VF - G/VG - G/VLLD - G0 - G1