Early Language Development Milestones

http://www.children.gov.on.ca/htdocs/English/topics/earlychildhood/speechlanguage/brochure_speech.aspx

http://www.asha.org/public/speech/development/chart/


http://www.ldonline.org/article/6313

http://www.parents.com/toddlers-preschoolers/development/language/language-development-milestones-ages-1-to-4/