Designed by

• Nick Levesque

2011

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- No Rights Reserved ( CC0 )

Designed by

• John Caserta

United States, 2011

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- Attribution ( CC BY 3.0 )

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John Caserta, from The Noun Project › Learn how to attribute

Designed by

• Øystein W. Arbo

Norway, 2009

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- Attribution ( CC BY 3.0 )

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Øystein W. Arbo, from The Noun Project › Learn how to attribute

Designed by

• Øystein W. Arbo

Norway, 2009

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- Attribution ( CC BY 3.0 )

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Øystein W. Arbo, from The Noun Project › Learn how to attribute

Designed by

• Benjamin Brandt

2012

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- No Rights Reserved ( CC0 )

Designed by

• Nathan Thomson

United States, 2012

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- Attribution ( CC BY 3.0 )

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Nathan Thomson, from The Noun Project › Learn how to attribute