Reference 160 Literature & Fiction 68 മലയാളം ;പഠനം; റെഫറന്‍സ് 58 Malayalam ; Study;Referance 57 Children's Books 43 Reference & Nonfiction 43 Malayalam; Referance 42 മലയാളം; റെഫറന്‍സ് 42 Non Fiction 39 reference 38 General Reference 21 Malayalam ; Study;Art;Referance 20 മലയാളം ;പഠനം;കല; റെഫറന്‍സ് 20 Reference services (Libraries) 17 English; General Reference 16 Reference books 15 Business & Investing 12 Folklore 12 Reference service 11 Reference services 11 Encyclopedia Britannica Ready Reference 10 Reference (Philosophy) 9 Reference sources 8 Generalia Reference Sources 7 Bibliography 6 Library Science 6 Reference Sources 6 Reference book 6 Year Book 6 മലയാളം; റെഫറന്‍സ്; പ്രബന്ധം 6