分类图谱

评分 3.9★

A Conchological Manual Sowerby, G. B. (George Brettingham), 1812-1884 Project Gutenberg · 2023 Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and …

评分 3.2★

The Diatomaceæ of Philadelphia and Vicinity Boyer, Charles S. (Charles Sumner), 1856-1928 Project Gutenberg · 2019 Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and …

评分 2.6★

An Elementary Study of Insects Haseman, Leonard, 1884-1969 Project Gutenberg · 2019 Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and …

评分 3.0★

Natural Gemstones Geological Survey Project Gutenberg · 2019 Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and …

评分 3.2★

European Fungus Flora： Agaricaceae Massee, George, 1850-1917 Project Gutenberg · 2019 Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and …