Tricker, B. (1976). Exploration for young scientists. Mills and Boon.
Lua i Stíl Chicago (17ú heag.)Tricker, B.J.K. Exploration for Young Scientists. London: Mills and Boon, 1976.
Lua MLA (9ú heag.)Tricker, B.J.K. Exploration for Young Scientists. Mills and Boon, 1976.
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