Téléphone : KLÉber 52-00 ? Télégr. UNESCO PARIS 19, AVENUE KLÉBER - PARIS XVI" UNESCO united nations educational, scientific and cultural organization organisation des nations unies pour l'éducation, la science et la culture In your reply, please refw to i En répondant, veuillez rappeler : N° ALC. 63677 19th December, 1950. Dear Mr. Rietveld, Thank you very much for your letter of December I4th. I am delighted that you will do the article for us. Would it be possible for you to let us have it by the end of the month ? We are rather pressed for time and would be grateful to have the manuscript as soon as possible. I gather you will send us your manuscript in English. You might think it useful, if this is the case, to attach a copy of your original manuscript if this is in Dutch, as it would simplify matters in fase there should be some checking to be done. I should be grateful if you would let me have the article in triplicfcte, as this speeds up the process of translating into other languages. The contract for your article has been sent to the Bureau of the Comptroller here for approval, and I will be forwarding it to you in the course of the next two or three days. Tours sincerely, Mr. G. Rietveld Vreeburg 8 Utrecht Holland.