. Cocaine and food deprivation : effects on food-reinforced fixed-ratio performance in pigeons. Cocaine; Food supply; Reinforcement (Psychology); Pigeons. 7404 70 c s 00 1000 - en n 100 X 10 o o 1 -. ? ? ;^ S 1000 100 - 10 - t % c s 234. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hughes, Christine

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Keywords: ., bookc, bookcentury1900, booksubjectfoodsupply, booksubjectpigeons