TY - GEN AU - Rzoska,Julian TI - The Nile: biology of an ancient river SN - 9061930812 : AV - QP1QH194 .P37 vol. 29 U1 - 574/.08 s574.92/9/62 PY - 1976/// CY - The Hague PB - Junk KW - Freshwater biology KW - Nile River KW - Stream ecology N1 - Includes bibliographies and indexes ER -