Resource request - information on sustainable stuff?

Hi.

I'm working on an article that focuses on the viability of truly sustainable living. For now, my focus is on food. I might need to expand it later.

I'm looking for resources for information on how much land it would take to support a person, or a family of four. I want to find out _how_ it would be done, what steps need to be taken and why, and what sort of diet it would provide (the answer to 'how much' will vary by diet, I know, and I'm looking to find out for a variety of diets).

In addition, I'm looking to find out how much _time_ it would require, and how many hands to do the work.

I have a lot of questions that need answering. I'm asking for your help in providing resources, so that I can do the research - books you've read on the subject, web sites, people to write to or interview, and so on. Anything and everything you can suggest will at least be looked into! :)

Thanks,
Sevidra