Moreno, E. 1990: Form and function of the fibularis brevis muscle in some passerine birds. Annales Zoologici Fennici 27: 39.
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Terhivuo, J. 1990: Relative regional abundance and colour morphs of the adder (Vipera berus L.), grass snake (Natrix natrix L.), slow worm (Anguis frasilis L.) and common toad (Bufo bufo L.) in Finland. Annales Zoologici Fennici 27: 1120.
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Voipio, P. 1990: The samson fox episode in Finland in the 1930s and 1940s, and the hypothetico-deductive method. Annales Zoologici Fennici 27: 2127.
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Väisänen, R. & Heliövaara, K. 1990: Morphological variation in Aradus cinnamomeus (Heteroptera, Aradidae): discrimination between parapatric alternate-year populations. Annales Zoologici Fennici 27: 2947.
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