Armstrong, F. (1960). The Strength Properties of Timber. Majesty's Stationery Office.
Lua i Stíl Chicago (17ú heag.)Armstrong, F.H. The Strength Properties of Timber. London: Majesty's Stationery Office, 1960.
Lua MLA (9ú heag.)Armstrong, F.H. The Strength Properties of Timber. Majesty's Stationery Office, 1960.
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