ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] We have made a systematic analysis of four kinds of control procedure on the performance of rats working on the FR5 schedule. The subjects were eight mature, male black hooded rats. They had been used in establishing a close effect curve, and so all of them had been injected frequently and their ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/218391a0
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