COMETS AND FORMATION OF PLANETS

[31] OPIK EJ, 1970, MOON, V1, P487

[32] OPIK EJ, 58 ARM OBS LEAFL

[33] OPIK EJ, 42 ARM OBS CONTR

[34] OPIK EJ, 11 ARM OBS CONTR

[35] OPIK EJ, 65 ARM OBS CONTR

[36] OPIK EJ, 37 ARM OBS CONTR

[37] OPIK EJ, 1958, IRISH ASTRON J, V5, P37

[38] OPIK EJ, 50 ARM OBS CONTR

[39] OPIK EJ, 1966, MEM SOC R SCI LIEGE, V12, P523

[40] OPIK EJ, 1955, IRISH ASTRON J, V3, P206

[31] OPIK EJ, 1970, MOON, V1, P487

[32] OPIK EJ, 58 ARM OBS LEAFL

[33] OPIK EJ, 42 ARM OBS CONTR

[34] OPIK EJ, 11 ARM OBS CONTR

[35] OPIK EJ, 65 ARM OBS CONTR

[36] OPIK EJ, 37 ARM OBS CONTR

[37] OPIK EJ, 1958, IRISH ASTRON J, V5, P37

[38] OPIK EJ, 50 ARM OBS CONTR

[39] OPIK EJ, 1966, MEM SOC R SCI LIEGE, V12, P523

[40] OPIK EJ, 1955, IRISH ASTRON J, V3, P206