Sam Moskowitz.The First College-Level Course in Science Fiction(англ.). Science Fiction Studies. — «I mailed him back the letter, for which I still had the dated envelope, and he got his social security—his only income for the next 20 years». Дата обращения: 9 февраля 2022. Архивировано 19 мая 2021 года.
Sam Moskowitz.The First College-Level Course in Science Fiction(англ.). Science Fiction Studies. — «I mailed him back the letter, for which I still had the dated envelope, and he got his social security—his only income for the next 20 years». Дата обращения: 9 февраля 2022. Архивировано 19 мая 2021 года.