Ramachandran Kodappally. (2007). Encyclopedia of inventions. Dronacharya Publications.
Chicago Edition CitationRamachandran Kodappally. Encyclopedia of Inventions. Kozhikode: Dronacharya Publications, 2007.
Deismireacht MLARamachandran Kodappally. Encyclopedia of Inventions. Dronacharya Publications, 2007.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.