Não informado. (1947). Strolling astronomer. Association of Lunar and Planetary Observers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Strolling Astronomer. Las Cruces, NM: Association of Lunar and Planetary Observers, 1947.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Strolling Astronomer. Association of Lunar and Planetary Observers, 1947.
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