CDC Étapes du développementhttps://www.cdc.gov/ncbddd/actearly/pdf/other-lang/France_CDC_LTSAE-Checklists21_Fra_FNL2_508.pdf
Communication Milestones: Age Rangeshttps://www.asha.org/public/developmental-milestones/communication-milestones/
CDC’s Developmental Milestoneshttps://www.cdc.gov/ncbddd/actearly/pdf/LTSAE-Checklist_COMPLIANT_30MCorrection_508.pdf
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