Daintith, John (2008). "tar". A Dictionary of Chemistry (6. bas.). Oxford University Press. doi:10.1093/acref/9780199204632.001.0001. ISBN9780199204632."Tar: Definition". Miriam Webster. 3 Nisan 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "a dark brown or black bituminous usually odorous viscous liquid obtained by destructive distillation of organic material (such as wood, coal, or peat)".
"tar and pitch" (6. bas.). The Columbia Electronic Encyclopedia. 15 Aralık 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "tar and pitch, viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat and certain other organic materials. "
Daintith, John (2008). "tar". A Dictionary of Chemistry (6. bas.). Oxford University Press. doi:10.1093/acref/9780199204632.001.0001. ISBN9780199204632."Tar: Definition". Miriam Webster. 3 Nisan 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "a dark brown or black bituminous usually odorous viscous liquid obtained by destructive distillation of organic material (such as wood, coal, or peat)".
"tar and pitch" (6. bas.). The Columbia Electronic Encyclopedia. 15 Aralık 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "tar and pitch, viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat and certain other organic materials. "
Daintith, John (2008). "tar". A Dictionary of Chemistry (6. bas.). Oxford University Press. doi:10.1093/acref/9780199204632.001.0001. ISBN9780199204632."Tar: Definition". Miriam Webster. 3 Nisan 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "a dark brown or black bituminous usually odorous viscous liquid obtained by destructive distillation of organic material (such as wood, coal, or peat)".
"tar and pitch" (6. bas.). The Columbia Electronic Encyclopedia. 15 Aralık 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "tar and pitch, viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat and certain other organic materials. "
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Daintith, John (2008). "tar". A Dictionary of Chemistry (6. bas.). Oxford University Press. doi:10.1093/acref/9780199204632.001.0001. ISBN9780199204632."Tar: Definition". Miriam Webster. 3 Nisan 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "a dark brown or black bituminous usually odorous viscous liquid obtained by destructive distillation of organic material (such as wood, coal, or peat)".
"tar and pitch" (6. bas.). The Columbia Electronic Encyclopedia. 15 Aralık 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mart 2013. "tar and pitch, viscous, dark-brown to black substances obtained by the destructive distillation of coal, wood, petroleum, peat and certain other organic materials. "