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Beyond the Call of Duty - A Biography of Whitland's Dr Penn: A Biography of Whitland's Dr Penn: Penn, Roger: 9781848515710: Amazon.com: Books
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Three Feathers and a Silver Fern: An... by Roger G. K. Penn Paperback / softback 9781848516724 | eBay
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Tech Talk - Hydrogen Fuel Cell Stack Design - Hydrogen Technology - Tech Engineering - Hyfindr Penn - YouTube
![Roger PENN | Professor | Ph D [Cantab], AcSS | Queen's University Belfast, Belfast | QUB | School of Sociology, Social Policy and Social Work | Research profile Roger PENN | Professor | Ph D [Cantab], AcSS | Queen's University Belfast, Belfast | QUB | School of Sociology, Social Policy and Social Work | Research profile](https://i1.rgstatic.net/ii/profile.image/278711610953744-1443461434759_Q512/Roger-Penn.jpg)