By Collins, Henry B. (Henry Bascom), 1899-1987 / Clark, Austin Hobart, 1880-1954 / Walker, Egbert H. (Egbert Hamilton), 1899-1991 . Genre Aleuts / Natural history / Alaska / Aleutian Islands / Aleutian Islands (Alaska) . Names sea / plants / island / leaves / flowers and 4375 more

By Emerson, George B. (George Barrell), 1797-1881 / Storer, David Humphreys, 1804-1891 / Peabody, William Bourn Oliver, 1799-1847 / Wyman, Jeffries, 1814-1874 / Dwight, Jonathan, 1858-1929 and 5 more . Genre n-us-ma / Fishes / Massachusetts / Reptiles / Massachusetts and 4 more . Names fin / fish / eye / insects / sea and 6949 more

By Clark, Austin Hobart, 1880-1954 . Genre Animals / Classification / Early works to 1800 . Names animals / animal / thorax / order / fin and 2600 more