Child Developmental Psychology

 https://www.psychologytoday.com/us/basics/child-development/developmental-disorders-and-delays 

https://link.springer.com/journal/10802 

https://www.psychologyschoolguide.net/guides/difference-between-developmental-psychology-and-abnormal-psychology/ 

https://en.wikipedia.org/wiki/Developmental_psychology 

https://www.apa.org/ed/graduate/specialize/child-clinical