Influence of variables on grain and accutance.

I would like to know where I can find a summary about the influence of agitation, dilution, temperature, etc. on grain, accutance, real film speed, etc.

For example: If I want fine grain: Do I need to extend developing and use weaker solution or just the opposite? And if I do so, do I get more or less contrast on film? (in this case I guess that I get more accutance).

Any suggestion?

Thanks

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