A few spells that were published in Greyhawk appeared in DD v1.
These were later replaced by alternate spells sourced from contemporary 'zine articles partly so that DD could be nearer to the original by not including material from the supplements, partly in recognition of the other creative energies that were happening around OD&D, and also partly to make DD somewhat distinct from other similar offerings.
It wouldn't be a problem if an adventure were to include spells from Greyhawk, AD&D, or other sources... they could be considered "new" research, or "old" treasures unearthed; either approach would work out fine

[f=32]
Golgildir the Elf Medium (MV 12", AC 9, HD 1, hp 1/1, AL N) great cloak,
lantern; spells: color spray; scrolls: sleep, sleep, charm person
Hirelings: Georges;
torch[/f]
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