1965 - Census Of India 1961 - Vol. VII - Kerala - Part VI D - Village Survey Monographs Alleppey District - M.K. Devassy 

1967 - Census of India 1961 - Vol. VII - Kerala - Part V A - Special Tables for Scheduled Castes and Scheduled Tribes - M.K. Devassy 

1964 - Census of India 1961 - Vol. VII - Kerala - Part VII A - Selected Crafts of Kerala - M.K. Devassy 

1968 - Census of India 1961 - Vol. VII - Kerala - Part I C - Subsidiary tables - M.K. Devassy 

1921 - Census Of Travancore- Code Of Procedure-Part-01-Enumeration 

1933 -Census of India Travancore-1931- Vol. XXVIII-Part III-Provincial Tables - N. Kunjan Pillai 

1966 - Census of India 1961 - Vol. VII - Kerala - Part VI G - Village Survey Monographs - Tribal Areas - M. K. Devassy 

1932- Census of India Travancore-1931- Vol. XXVIII-Travancore - N. Kunjan Pillai 

1912 - Census of India - 1911 - Volume XVIII - Cochin