幼儿园计算贴绒教具（三） You'eryuan jisuan tierong jiaoju (san) Designer Designer unknown (未知) Date 1981, January Publisher Shaonian ertong chubanshe (少年儿童出版社) Size 77x53 cm. Call nr. BG E13/29 Collection Landsberger collection Link to IISH catalog https://search.iisg.amsterdam/Record/933038
