Die, frei in der reinen Erde und im süssen Wasser lebenden Nematoden der niederländischen Fauna : eine systematisch-faunistische Monographie Q Science
Flora of the northwest coast, including the area west of the summit of the Cascade Mountains, from the forty-ninth parallel south to the Calapooia Mountains on the south border of Lane County, Oregon Q Science
Report of the North Carolina geological survey : agriculture of the eastern counties : together with descriptions of the fossils of the marl beds Q Science
