RT Journal Article SR Electronic T1 Antinociceptive responses after microinjection of morphine or lanthanum in discrete rat brain sites. JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 46 OP 55 VO 206 IS 1 A1 E T Iwamoto A1 R A Harris A1 H H Loh A1 E L Way YR 1978 UL http://jpet.aspetjournals.org/content/206/1/46.abstract AB