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Erikson, Rolf and Pum, Manfred and Vammen, Katherine and Cruz Granja, Adela del Carmen and Ruíz, M and Zamora, H (1997) Nutrient Availability and the Stability of Phytoplankton Biomass and Production in Lake Xolotlán (Lake Managua, Nicaragua). Limnologica, 27 (2). pp. 157-164.
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