BOLTON, W. H. (2021). Materials for enginners and technicians. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBOLTON, William Higgins. Materials for Enginners and Technicians. Routledge, 2021.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBOLTON, William Higgins. Materials for Enginners and Technicians. Routledge, 2021.
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