All of this art was published in various Dungeons and Dragons books and supplement. Might be a couple drawings from HARP (High Adventure Role Play)
Published in Dungeon Magazine (TSR) 
Poisonous Dragon from Jade Dragons and Hungry Ghosts 
Published in Dungeon Magazine (TSR) 
Bastards and Bloodlines Remorhaz Fight (Green Ronin) 
Wrath and Rage: Orc Gods 
Wrath and Rage: Charge 
Wrath and Rage: Holy 
Wrath and Rage: Faeries 
Wrath and Rage: Kiss of Life 
Wrath and Rage: Ragesmith 
Wrath and Rage: Anathema Nymph 
Wrath and Rage: Arbalest 
Wrath and Rage: Arrow Storm 
Wrath and Rage: Brain Damage 
Wrath and Rage: Bride 
Wrath and Rage: Cutthroat 
Wrath and Rage: Dire Rhino 
Wrath and Rage: Giant Leech 
Giant Slug 
Wrath and Rage: Half Orc/Half Owlbear 
Wrath and Rage: Miscast Spell 
Wrath and Rage: Patron 
Wrath and Rage: Orc Pirate 
Wrath and Rage: Rabid Boar 
Wrath and Rage: Ram Armor 
Wrath and Rage: Rich 
Wrath and Rage: Glider 
Wrath and Rage: Sapper 
Wrath and Rage: Scar 
Wrath and Rage: Shaman 
Wrath and Rage: Soul Gorger 
Wrath and Rage: Sick 
Wrath and Rage: Battle RAge