APA
"ANNUAL REPORT 1970 KERALA ENGG. RESEARCH INSTITUTE, PEECHI". : GOVT. OF KERALA PUBLIC WORKS DEPT.
Chicago
"ANNUAL REPORT 1970 KERALA ENGG. RESEARCH INSTITUTE, PEECHI". : GOVT. OF KERALA PUBLIC WORKS DEPT.
Harvard
"ANNUAL REPORT 1970 KERALA ENGG. RESEARCH INSTITUTE, PEECHI". : GOVT. OF KERALA PUBLIC WORKS DEPT.
MLA
: GOVT. OF KERALA PUBLIC WORKS DEPT. .