Prehistoric animals, 1990, 6 stamps
Prehistoric animals, 1994, 6 stamps
Prehistoric animals, 2003, 4 stamps
Prehistoric animals, 1990, 6 stamps
Prehistoric animals, 1990, 12 stamps
Prehistoric animals, 2003, 16 stamps
Prehistoric animals, 2003, 4 stamps
Prehistoric animals, 1971, 6 stamps