Tài liệu tham khảo WikiPedia: Gollaprolu http://dtcp.ap.gov.in:9090/webdtcp/Municipalities%... http://www.censusindia.gov.in/2011census/dchb/2814... http://r.vemuri.home.comcast.net/ecofoundation/pro... https://archive.is/20121220025616/http://r.vemuri.... https://web.archive.org/web/20151113225906/http://... https://web.archive.org/web/20160128175528/http://...
