by+letter
121LETTER OF INTENT (LOI) — Письмо о намерениях, развернутая заявка покупателя на покупку какого либо товара с указанием условий Словарь бизнес терминов. Академик.ру. 2001 …
122letter of apology — letter containing an apology …
123letter of application — letter containing a request (for a job, money, etc.) …
124letter of appreciation — letter of respect, certificate of esteem …
125letter of attorney — letter of authorization, power of attorney …
126letter of credence — letter of recommendation …
127letter of delegation — letter of authorization, power of attorney …
128letter of introduction — letter listing one s credentials …