"Url","Type","Title","Publisher Place","Publisher","Date","Authors","Volume","Language","Pages"
"http://www.biodiversitylibrary.org/page/32629338","Serial","Iberus : revista de la Sociedad Española de Malacología.","Barcelona :","La Sociedad,","1981","Sociedad Española de Malacología.       ","v. 16-17 (1998-99)","Spanish","Page 55"
"http://www.biodiversitylibrary.org/page/32629346","Serial","Iberus : revista de la Sociedad Española de Malacología.","Barcelona :","La Sociedad,","1981","Sociedad Española de Malacología.       ","v. 16-17 (1998-99)","Spanish","Page 63"
"http://www.biodiversitylibrary.org/page/3163395","Serial","Occasional papers of the California Academy of Sciences.","San Francisco :","California Academy of Sciences,","1963","California Academy of Sciences.       ","no. 35 (1963)","English","Page 66"