A summary table on the topic: "Stages of formation of speech therapy assistance to persons with disabilities in Russia."
Stage I: the emergence and development of the prerequisites for the formation of a speech therapy system - the end of the 19th century - the beginning of the 20th century.
Stage II: the formation of speech therapy for people with speech impairments - the beginning of the 30s - the beginning of the 60s of the XX century.
Stage III: development and improvement of the system of speech therapy assistance from the 70s to the 90s of the XX century.
Stage IV: the transformation of organizational forms and the search for new 90s of the XX century - the present.