Findings:

• Encyclopedia
• Encyclopedia Galactica
• The Catholic Encyclopedia
• Encyclopedia Brown
• Encyclopedia Mythica
• Lovecraft Encyclopedia
• Everything Japanese Encyclopedia
• Funk & Wagnall's Encyclopedia
• Woman's Encyclopedia of Myths and Secrets
• Encyclopedia of Arda
• The Encyclopedia of Science Fiction
• The Encyclopedia of Fantasy
• Encyclopedia Astronautica
• Evangelion Encyclopedia
• The Dune Encyclopedia
• Star Trek Encyclopedia
• World Encyclopedia of Twentieth Century Murder
• The Encyclopedia of Modern Military Weapons
• Encyclopedia of Pop Culture
• The Catholic Encyclopedia: 1908 Introduction
• The Catholic Encyclopedia: A
• The Catholic Encyclopedia: B
• The Catholic Encyclopedia: C
• The Catholic Encyclopedia: D
• The Catholic Encyclopedia: E
• The Catholic Encyclopedia: F
• The Catholic Encyclopedia: G
• The Catholic Encyclopedia: H
• The Catholic Encyclopedia: I
• The Catholic Encyclopedia: J
• The Catholic Encyclopedia: K
• The Catholic Encyclopedia: L
• The Catholic Encyclopedia: M
• The Catholic Encyclopedia: N
• The Catholic Encyclopedia: O
• The Catholic Encyclopedia: P
• The Catholic Encyclopedia: Q
• The Catholic Encyclopedia: R
• The Catholic Encyclopedia: S
• The Catholic Encyclopedia: T
• The Catholic Encyclopedia: U
• The Catholic Encyclopedia: V
• The Catholic Encyclopedia: W
• The Catholic Encyclopedia: X
• The Catholic Encyclopedia: Y
• The Catholic Encyclopedia: Z
• Great Soviet Encyclopedia
• Old encyclopedias
• The Anime Encyclopedia
• Encyclopedia on a toothpick
• Encyclopedia salesperson
• Benet's Reader's Encyclopedia
• Encyclopedia of World Biography
• Grolier Multimedia Encyclopedia
• Benet's Reader's Encyclopedia of American Literature
• The American Spectrum Encyclopedia
• Encyclopedia of Unusual Sex Practices
• The On-Line Encyclopedia of Integer Sequences
• When the Ocean existed outside of encyclopedias
• Encyclopedia Britannica
• Encyclopedia Brown taught me everything I need to know about opening doors
• Encyclopedia dramatica
• The New Princeton Encyclopedia of Poetry and Poetics
• Encyclopedia Blipvertica
• if you could make an encyclopedia smile
• Encyclopedia of Triangle Centers
• Encyclopedia of Life
• Stanford Encyclopedia of Philosophy
• psychoactive
• psychoactive drug
• advanced mathematical theorems as a psychoactive substitute
• substance
• Substance D
• substance abuse
• Schwann's white substance
• Center for Alcohol and Substance Abuse Research at Columbia University
• Style Over Substance
• My nose is producing fluorescent'y substances, should I be concerned?
• a history of substance abuse
• A Form Of No Substance
• controlled substance
• Controlled Substances Act
• substance P
• No Substance
• We CAN walk through walls since we're only 0.01% substance
• Substance Monism
• Substance dualism
• Aristotle's Doctrine of Substances
• Controlled Substance Analogue Enforcement Act of 1986
• Relative addictiveness of commonly used drugs and substances
• Metal Gear Solid 2: Substance
• H substance
• White Knuckled Substance
• A semblance of substance
• unauthorized substance tax
• A substance in a cushion
• White-knuckle substance abuse
• low grade substance abuse
• Trading satellites for substance
• the shadow takes on substance
• Art is emotion made substance
• Each substance of a grief hath twenty shadows
• His collection of substances that should not exist was stolen. The thieves then killed themselves 1000 times over.

If you Log in you could create a "Encyclopedia of Psychoactive Substances" node. If you don't already have an account, you can register here.