Monstrous Compendium: Greyhawk Adventures Appendix (1990)

From the back cover:

Prepare yourselves and your characters.... Here come more monsters, this time from the GREYHAWK® Campaign Setting! These 64 pages are filled with beasties and creatures, from aspis to zygon—and everything in-between! Crystalmist, dragons (yes, there are more—four more to be precise), and plenty of deadly plants await entry into your campaign. As always, these monster descriptions are organized into 64 5-hole punched pages, ready to be incorporated into your Monstrous Compendium binder. And, you get four full-color dividers with identification tabs! Snap them in, and set them free!