Tohutoro APA (7th ed.)
Groen, M. B. (1970). The Synthesis and properties of some heterohelicenes.
Tohutoru Kātū Chicago (17th ed.)
Groen, Marinus Bernard. The Synthesis and Properties of Some Heterohelicenes. Groningen, 1970.
Tohutoro MLA (9th ed.)
Groen, Marinus Bernard. The Synthesis and Properties of Some Heterohelicenes. 1970.
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