>>512120322
Your best bet is to read the scientific publications directly or find articles that summarize them.
Look up stuff on Psittacosaurus, it's one of the dinosaurs we have the most information about.

https://www.nature.com/articles/s42003-022-03749-3

https://www.researchgate.net/publication/334683503_Psittacosaurus_amitabha_a_New_Species_of_Ceratopsian_Dinosaur_from_the_Ondai_Sayr_Locality_Central_Mongolia