Green roofs – Green cities

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$20 - $500: - We acknowledge Your name in the book and in any article we publish. $501 - $1000: - We acknowledge Your name in the book and any article we publish. - We send 5 ($500) to 10 ($1000) free copies of the book. $1001 - and above: - We acknowledge Your name in the book and any article we publish. - We send 10 free copies of the book. - We allow You to read one early version of the book and involve You in the creative work.

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Ferenc Vilisics

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