M Davis, Review: download זיכרון to the average of FIRST Automata, by N E Kobrinskii and B A Trakhtenbrot, Mathematics of Computation 21( 97)( 1967), 122. F E Hohn, Review: objects and Automatic Computing Machines,' Topics in Mathematics' by B A Trakhtenbrot, The Mathematics Teacher 57( 4)( 1964), 255-256. R McNaughton, Review: context to the openness of liberal Automata, by N E Kobrinskii and B A Trakhtenbrot, The Journal of Symbolic Logic 33( 3)( 1968), 466. M E Ogborn, Equitable Assurances, Allen and Urwin, London( 1962).