Scientific and technical societies of the United States and Canada. Pt. 1, Scientific and technical societies of the United States - Kohr, John R.; National Research Council (Waszyngton). Library (Washington : National Academy of Sciences - National Research Council, 1955)
Indeksy.
Keywords: Akademie i towarzystwa naukowe -- Kanada -- encyklopedie; Akademie i towarzystwa naukowe -- Stany Zjednoczone -- encyklopedie