NTR Encyclopedia source

https://e-hentai.org/g/1579993/64615fd7fb/

All artists can be found on gelbooru:

Traditional elf: shiokonbu
Modern elf: ootomo takuji
Orc: nbo
Minotaurs: Okayado
Kitsune: oyu (sijimisizimi)
Wombs of the gods: houtengeki
Living doll: Kenkou cross
Naga: terupancake
Dullahan megane man
Jinko: Kenkou cross
Hellhound: Alder
Western dragon : ran'ou (tamago no kimi)
Eastern dragon: lindaroze
Wight: Kenkou Cross
Centaur: Okayado
Mermaid :matsunoki
Elf Queen: Uno Makoto