From living cells to dinosaurs
by Roy A. Gallant · 1986
Discusses the changes that took place on land and in plants and animals, from the Precambrian to the Mesozoic era, when dinosaurs reached their peak.
Juvenile literaturePaleontology
by Roy A. Gallant · 1986
Discusses the changes that took place on land and in plants and animals, from the Precambrian to the Mesozoic era, when dinosaurs reached their peak.