...He haddeveloped a fixation, unreasoning and murderous; he'd get even withthe man who had caused the trouble... 
Various 「Astounding Stories, August, 1931」
... 'Sur la Production et la Fixation des Variétés,' 1865, p...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...In a general treatise on the subject of territorialism, Nice (1933:98), summarizing Howard, stated: "Territory implies in the male bird isolation, advertisement, fixation, and intolerance...
Glen E. Woolfenden 「Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima」
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