1. Anon, 1975. Plastic cups found in fish. Marine Pollution Bulletin 6, 148
2. Anon, 1990. Garbage. Center for Marine Conservation, Washington DC
3. Amos, A.F., 1993. Solid waste pollution on Texas beaches: a post MARPOL annex V study, vol. 1. OCS Study MMS 93-0013. United States Department of Interior, New Orleans
4. Andrady, A.L., Pegram, J.E., Olson, T.M., 1992. Research and development of two marine-degradable biopolymers. Report, David-Taylor Research Centre, Research Triangle Park, Northern Carolina, USA
5. Marine birds and plastic pollution;Azzarello;Marine Ecology Progress Series,1987