Archive image from page 22 of The dinosaur book the The dinosaur book : the ruling reptiles and their relatives dinosauruli13colb Year: 1945 Joseph Leidy (1823-1891) inaugurated the period of continuous research in vertebrate paleontology in North America Edward Drinker Cope (1840-1897), of Quaker ancestry, was a leading pioneer in the search for fossil animals in our West

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