Bibliography and Citations

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Pilsbry H.A, Henderson J.B.  1931.  A new subspecies of Polygyra from Idaho.  Nautilus.  44:121-122.
Pilsbry H.A, Vanatta E.G.  1897.  A new species of Hemphilia.  Nautilus.  11:44.
Pilsbry H.A, Brunson R.B.  1954.  The Idaho-Montana slug Magnipelta (Arionidae).  Notulae Naturae.  262:2626pp..
Pilsbry H.A.  1939.  Land Mollusca of North America (North of Mexico).  Academy of Natural Sciences of Philadelphia Monograph.  3(1):1-573.
Pilsbry H.A.  1948.  Land Mollusca of North America (north of Mexico), vol. 2. pt. 2.  Academy of Natural Sciences of Philadelphia Monograph.  3(2):521-1113.
Pilsbry H.A.  1902.  New American land shells.  Nautilus.  16:30-33.
Pilsbry HA.  1933.  Notes on the anatomy of Oreohelix,—III, with descriptions of new species and subspecies.  Proceedings of the Academy of Natural Sciences of Philadelphia.  85:383-410.  Available from http://www.jstor.org/stable/4064181
Pilsbry H.A.  1907.  A new species of Fluminicola.  Nautilus.  21:75-76.
Pilsbry H.A.  1946.  Land Mollusca of North America (north of Mexico), vol. 2, pt. 1.  Academy of Natural Sciences of Philadelphia Monograph.  3(2):1-520.
Pilsbry H.A.  1953.  Magnipelta, a new genus of Arionidae from Idaho.  Nautilus.  67:37-38.
Pilsbry H.A.  1928.  Species of Polygyra from Montana, Idaho, and the Pacific coast states.  Proceedings of the Academy of Natural Sciences of Philadelphia.  80:177-186.
Pilsbry H.A.  1934.  Notes on the anatomy of Oreohelix, -III, with description of new species and subspecies.  Proceedings of the Academy of Natural Sciences of Philadelphia.  85:383-410.
Pilsbry H.A.  1940.  Land Mollusca of North America (north of Mexico), vol. 1, pt. 2.  Academy of Natural Sciences of Philadelphia Monograph.  3(1):575-994.
Pilsbry H.A.  1935.  Western and southern Amnicolidae and a new Humboldtiana.  Nautilus.  48:91-94.
Pilsbry H.A.  1903.  A new American genus of Arionidae.  Proceedings of the Academy of Natural Sciences of Philadelphia.  55:626-629.
Pilsbry H.A, Henderson J.B.  1930.  [A new subspecies of Polygyra from Idaho].  Nautilus.  44:5,figs.8-10.
Pilsbry H.A.  1917.  Notes on the anatomy of Oreohelix. II.  Proceedings of the Academy of Natural Sciences of Philadelphia.  69:42-46.
Pilsbry HA.  1934.  Geographic Distribution of Pupillidae; Strobilopsidae, Valloniidae and Pleurodiscidae. In Manual of Conchology, Second series: Pulmonata.  Volume XVIII.  
Pilsbry H.A.  1899.  Catalogue of the Amnicolidae of the western United States.  Nautilus.  12:121-127.
Pilsbry H.A.  1939.  Land Mollusca of North America (north of Mexico), vol. 1, pt. 1.  Academy of Natural Sciences of Philadelphia Monograph.  3(1):1-574.
Pilz D., Molina R..  1996.  Managing forest ecosystems to conserve fungus diversity and sustain wild mushroom harvests.  
Pilz G.E.  1978.  Systematics of Mirabilis subgenus Quamoclidion (Nyctaginaceae).  Madrono.  25(3):113-132.
Pimentel RA.  1960.  Inter- and intrahabitat movements of the rough-skinned newt, Taricha torosa granulosa (Skilton).  American Midland Naturalist.  63(2):470-496.  Available from http://www.jstor.org/stable/2422806
Pimentel D, Zuniga R, Morrison D.  2005.  Update on the environmental and economic costs associated with alien-invasive species in the United States.  Ecological Economics.  52(2005):273–288.  Available from http://www.sciencedirect.com/science/article/pii/S0921800904003027
Pimm S.L.  1993.  Life on an intermittent edge.  Trends in Ecology and Evolution.  8(2):45-46.