By Hitchcock, A. S. (Albert Spear), 1865-1935 . Genre n-us--- / Grasses / United States . Names grass / grasses / plants / soil / leaves and 4031 more

By Hedrick, U. P. . Genre n-us--- / Viticulture / United States / Grapes / Varieties and 1 more .

By Scott, William Earl Dodge, 1852-1910 . Genre Birds / United States / Birds / Juvenile literature . Names island / life / sea / called / animals and 1320 more

By Harwood, William Sumner, 1857-1908 . Genre Agriculture / United States . Names life / soil / bacteria / plants / wheat and 1446 more

By Taylor, Henry Charles, 1873- . Genre Land / Agriculture / Economic aspects / Agriculture / Economic aspects and 3 more .

By Hedrick, U. P. . Genre n-us--- / Viticulture / United States / Grapes / Varieties and 1 more . Names fruit / american / berries / leaves / seeds and 7217 more

By Boerker, Richard Hans Douai, 1887- . Genre United States.Forest Service. / Forests and forestry / United States . Names california / area / wood / areas / na and 838 more

By Boerker, Richard Hans Douai, 1887- . Genre United States.Forest Service. / Forests and forestry / United States . Names california / area / wood / areas / na and 838 more

By Peterson, Maude Gridley, b. 1871 . Genre n-us--- / Botany / United States / Fruit / Identification and 2 more .

By Peterson, Maude Gridley. . Genre Botany / United States . Names leaves / fruit / flowers / berries / calyx and 2891 more