SECULAR CHANGES IN METEORITIC FLUX THROUGH HISTORY OF SOLAR SYSTEM

[11] KOPAL Z, 1962, 32225 JET PROP LAB C

[12] INTERIOR OF MOON - OBSERVATIONS FROM SPACE VEHICLES WILL PROVIDE FURTHER CLUES TO HISTORY OF EARTH-MOON SYSTEM [J]. SCIENCE, 1961, 133 (345) : 1045 - &

[13] THE LUNAR SURFACE AS AN IMPACT COUNTER [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1960, 120 (05) : 404 - 411

[14] Opik EJ, 1958, IRISH ASTRON J, V5, P34

[11] KOPAL Z, 1962, 32225 JET PROP LAB C

[12] INTERIOR OF MOON - OBSERVATIONS FROM SPACE VEHICLES WILL PROVIDE FURTHER CLUES TO HISTORY OF EARTH-MOON SYSTEM [J]. SCIENCE, 1961, 133 (345) : 1045 - &

[13] THE LUNAR SURFACE AS AN IMPACT COUNTER [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1960, 120 (05) : 404 - 411

[14] Opik EJ, 1958, IRISH ASTRON J, V5, P34