Tohutoro APA (7th ed.)
Duggal, A. K., & Puri, V. P. (1991). Laboratory manual in highway engineering. New Age International.
Tohutoru Kātū Chicago (17th ed.)
Duggal, Ajay K., me Vijay P. Puri. Laboratory Manual in Highway Engineering. Kolkata: New Age International, 1991.
Tohutoro MLA (9th ed.)
Duggal, Ajay K., me Vijay P. Puri. Laboratory Manual in Highway Engineering. New Age International, 1991.
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