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  1. By: Sowerby, G. B. (George Brettingham),
    Publication info: London, Simpkin, Marshall, 1859
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    Subjects: Geographical distribution  Great Britain  Identification  Mollusca (Sistematica)  Mollusks  Shells  
  2. By: Conrad, T. A. (Timothy Abbott),
    Publication info: Philadelphia, J. Dobson, 1836
    Holding Institution: Multiple institutions
    Subjects: Mollusca (Sistematica)  Mollusks  North America  Pictorial works  Unionidae
  3. By: Bourguignat, J. R. (Jules René),
    Publication info: Paris Tremblay 1886
    Holding Institution: Multiple institutions
    Subjects: Africa  Field guides  Identification  Mollusca (Sistematica)  Mollusks  
  4. By: Carpenter, Philip P. (Philip Pearsall),
    Publication info: London, Taylor and Francis, 1857
    Holding Institution: California Academy of Sciences
    Subjects: Mollusca (Sistematica)  Mollusks  North America  Pacific coast