Singh, G. (2000). Map work and practical geography (4th ed.). Vikas.
Chicagoスタイル(17版)引用形式Singh, Gopal. Map Work and Practical Geography. 4th ed. New Delhi: Vikas, 2000.
MLA(9版)引用形式Singh, Gopal. Map Work and Practical Geography. 4th ed. Vikas, 2000.
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