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- Northern Nut Growers Association Report of the Proceedings at the 41st Annual Meeting Pleasant Valley, New York, August 28, 29 and 30, 1950Northern Nut Growers Association
- Practical taxidermyMontagu Browne
- Granny's Wonderful ChairFrances Browne
- Puck of Pook's Hillروديارد كيبلينغ
- Bird Stories from Burroughs Sketches of Bird Life Taken from the Works of John BurroughsJohn Burroughs
- A Color Notation A measured color system, based on the three qualities Hue, Value and ChromaA. H. Munsell
- Birds from Coahuila, MexicoEmil K. Urban
- Comment on construit une maisonEugène-Emmanuel Viollet-le-Duc
- The Apple-Tree The Open Country Books—No. 1L. H. Bailey
- Ontario Teachers' Manuals: Nature StudyOntario. Department of Education
- Peat and its Uses as Fertilizer and FuelSamuel W. Johnson
- Seed DispersalW. J. Beal
- Creative EvolutionHenri Bergson
- Discovery of Oxygen, Part 2Carl Wilhelm Scheele
- This Simian WorldClarence Day
- El MarJules Michelet
- The Young Farmer: Some Things He Should KnowThomas Forsyth Hunt
- Life and Matter: A Criticism of Professor Haeckel's "Riddle of the Universe"Oliver Lodge
- A Child's Primer of Natural HistoryOliver Herford
- Of Natural and Supernatural Things Also of the first Tincture, Root, and Spirit of Metals and Minerals, how the same are Conceived, GenerateBasilius Valentinus
- Our Bird ComradesLeander S. Keyser
- Le péril jauneYakov Aleksandrovich Novikov
- A brother to dragons, and other old-time talesAmélie Rives
- Arago et sa vie scientifiqueJoseph Bertrand
- Are the Effects of Use and Disuse Inherited? An Examination of the View Held by Spencer and DarwinW. P. Ball
- New observations on the natural history of beesFrançois Huber
- Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.George Francis Atkinson
- A System of Logic, Ratiocinative and Inductive (Vol. 1 of 2)جون ستيوارت مل
- Anecdotes of DogsEdward Jesse
- Description of a New Vespertilionine Bat from Yucatan Author's Edition, extracted from Bulletin of the American Museum of Natural History, VJ. A. Allen
- The Log of the Sun: A Chronicle of Nature's YearWilliam Beebe
- On The Affinities of Leptarctus primus of Leidy American Museum of Natural History, Vol. VI, Article VIII, pp. 229-331.Jacob Lawson Wortman
- Fruits of QueenslandAlbert H. Benson
- Le viandier de TailleventTaillevent
- Minnie's Pet DogMadeline Leslie
- Minnie's Pet ParrotMadeline Leslie
- Minnie's Pet MonkeyMadeline Leslie
- Minnie's Pet LambMadeline Leslie
- Minnie's Pet HorseMadeline Leslie
- The Road to Ozل. فرانك باوم
- Travels in Peru, on the Coast, in the Sierra, Across the Cordilleras and the Andes, into the Primeval ForestsJohann Jakob von Tschudi
- The Genus PinusGeorge Russell Shaw
- Village Improvements and Farm VillagesGeorge E. Waring
- The Tale of Lal A FantasyRaymond Paton
- Determining the Age of Cattle by the TeethGeorge W. Pope
- Conservation ReaderHarold W. Fairbanks
- The Magic Soap BubbleDavid Cory
- Chapters in Rural ProgressKenyon L. Butterfield
- Peter Pan in Kensington GardensJ. M. Barrie
- Peter Pan in Kensington GardensJ. M. Barrie
- More Science from an Easy ChairE. Ray Lankester
- A New Subspecies of the Black Myotis (Bat) from Eastern MexicoE. Raymond Hall
- Le multilinguisme sur le WebMarie Lebert
- Entretiens (1998-2001)Marie Lebert
- Entretiens / Interviews / EntrevistasMarie Lebert
- Le Livre 010101: EnquêteMarie Lebert
- Le Livre 010101, Tome 1 (1993-1998)Marie Lebert
- Le Livre 010101, Tome 2 (1998-2003)Marie Lebert
- Les mutations du livreMarie Lebert
- Les technologies et le livre pour tousMarie Lebert