(1939). Vol. 31, № 9; Industrial and Engineering Chemistry. Industrial Edition. 1939.
Cita Chicago (17th ed.)Vol. 31, № 9; Industrial and Engineering Chemistry. Industrial Edition. 1939, 1939.
Cita MLA (9th ed.)Vol. 31, № 9; Industrial and Engineering Chemistry. Industrial Edition. 1939, 1939.
Atenció: Aquestes cites poden no estar 100% correctes.