LINGO LIBRARY · 73581The blackboard clock : $b device desk book for the primary teacher, for teaching pupils in first year and kindergarten grades how to tell time of day by the clock, and time drill.✳Aldrich, EvaENA2 · GeschätztThe blackboard clock : $b device desk book for the primary teacher, for teaching pupils in first year and kindergarten grades how to tell time of day by the clock, and time drill.Aldrich, Eva