Aquaponic: Where can I find quality crop circle diagrams online?

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Question by rob r: Where can I locate good quality crop circle diagrams on-line?
I have been looking for quality crop circle diagrams for a school project for the last couple of days with no luck. I can locate the diagrams of 2010 on cropcircleconnector, but none of previous years. Is there a internet site that Google is missing with a database of these images? I'm seeking for some thing comparable to this link

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