Cycloheximide affects memory within minutes after the onset of training.

Nature

Squire LR, Smith GA, Barondes SH. Cycloheximide affects memory within minutes after the onset of training. Nature. 1973 Mar 16; 242(5394):201-2.

1973
http://profiles.ucsf.edu/profile/303525
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Squire LR, Smith GA, Barondes SH