ABBOTT, T. (Ed.). Internet world’s. On Internet 94 : An international guide to electronic journals,
newsletters, texts, discussion lists, and other resources on the Internet. Westport-London, Mecklermedia, 1994

FEIDT, W. B. ; ROOS, C. Environmental Information Resources on the Internet. Bull. Am. Soc. Inf. Sci., 1995, 21(4), 22-23 

GAYLE, P. Environmental online: Update ‘94. Database, 1994, 17(6), 25-29

HAHN, H. I n t e rnet: Manual de referencia. Madrid, etc, Osborne-Mc Graw-Hill, 1994.

LAWSON, R. Defenders of the Earth . Net, 1995, Oct., 42-45

MERCIER, M. The Green Net. Exploring environmental cyberspace with computer and modem. Emagazine, 1995, 6(1), 48-49

NOTESS, G. B. The CIESIN for global change. Database, 1994, 17(3), 95-97