When you talk about RuneQuest and Old School, you inevitably think White Dwarf – at least if you are 40~50 years old and European.
One series of RQ articles we all remember fondly (even if it was “Gateway”, i.e., not set in Glorantha) was the one about demons and demonology. The first instalment in the series, titled “Dealing With Demons”, appeared in White Dwarf issue No.44 (August 1983). The good news is that it has just been made available on Dave Morris' blog. Enjoy!