Do you think it is more effective to search the invisible web (databases) than using search engines, meta-search or subject directories? Why? For search engines like google, it give a whole chunk of info be it useful or useless. for meta-search and subject directories, they show a more clear and define information, in subject directories is catoragise it into sport, business etc.
for invisible web they summrize the topic of what u are looking for give a very up-to date information. like research and report from other professional people.
overall i think invisible web is more effective in doing  my research. moreover all this website is provide by my school temesk poly. which i think would be more relavent and reliable. as they are maintain by school or government people. but the bad thing for this is, it does'nt come free. luckly i am a student i am able to acess it for free to do my project.