No abstract available
MeSH terms
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Animals
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Carcinogens
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Esophageal Neoplasms / chemically induced*
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Esophageal Neoplasms / pathology
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Esophagoscopy
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Male
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Neoplasms, Experimental / chemically induced
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Neoplasms, Experimental / pathology
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Nitrosomethylurethane / analogs & derivatives*
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Rats
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Time Factors
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Urethane / analogs & derivatives*
Substances
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Carcinogens
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Urethane
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Nitrosomethylurethane
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N-n-butyl-N-nitrosourethane