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المؤلفون: <a href='https://dar.bibalex.org/ar/Search/ExactResults.aspx?format_Id=1&author=Jackson%2C%20Robert%20Tracy.'> Jackson, Robert Tracy.
المساهمون: <a href='https://dar.bibalex.org/ar/Contributor/ContributorItems.aspx?contributor=Biodiversity%20Heritage%20Library&format_id=1'> Biodiversity Heritage Library
المجموعات: <a href='https://dar.bibalex.org/ar/Collection/CollectionItems.aspx?collection=Biodiversity%20Heritage%20Library&format_id=1'> Biodiversity Heritage Library
التصنيف: <a href='https://dar.bibalex.org/ar/Category/CategoryDetails.aspx?mainCat=Others&format_id=1'> Others
الموضوعات: Echinodermata

Phylogeny of the Echini with a revision of Palaezoic species.