Ramachandran Kodappally. (2007). Encyclopedia of inventions. Dronacharya Publications.
Chicago Edition CitationRamachandran Kodappally. Encyclopedia of Inventions. Kozhikode: Dronacharya Publications, 2007.
MLA Edition CitationRamachandran Kodappally. Encyclopedia of Inventions. Dronacharya Publications, 2007.
Warning: These citations may not always be 100% accurate.