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Galdean Nicolae: Some considerations about the rheophilic elements of the benthic fauna (ord. Ephemeroptera, Plecoptera and Trichoptera) of the Upper Tisa region. In: The Upper Tisa valley : preparatory proposal for Ramsar site designation and an ecological background Hungarian, Romanian, Slovakian and Ukrainian co-operation 4. pp. 413-425. (1999)
Galdean Nicolae; Staicu Gabriela; Bacalu Petru: The assessment of the bioindicator value of some rheophilic elements of the river Someş/Szamos lotic system. In: The Somes/Szamos river valley : a study of the geography, hydrobiology and ecology of the river system and its environment 3. pp. 215-222. (1999)
Sárkány-Kiss Endre; Galdean Nicolae; Mihailescu Nicolae: Description of the sampling sites along the rivers in the Criş/Körös basin. In: The Cris/Körös rivers' valleys : a study of the geography, hydrobiology and ecology of the river system and its environment 2. pp. 7-14. (1997)
Galdean Nicolae; Staicu Gabriela; Bacalu Petru: The assessment of lotic ecosystems from the hydrographical unity Criş/Körös river system, according to the benthic associations. In: The Cris/Körös rivers' valleys : a study of the geography, hydrobiology and ecology of the river system and its environment 2. pp. 243-261. (1997)
