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15by Andrews, J.T., Webber, P.J., Nichols, H.Get access
Published in Review of Palaeobotany and Palynology (1979)
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18by Webber, P. J., Richardson, J. W., Andrews, J. T.Get access
Published in Canadian Journal of Earth Sciences (1970)
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19by Walker, D. A., Short, S. K., Andrews, J. T., Webber, P. J.Get access
Published in Arctic and Alpine Research (1981)
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