Schweingruber, F. H., & Brunner, M. (2007). Tree-ring measurements of Picea engelmannii (Engelmann spruce) from sample COTTON-81. PANGAEA.
Cita Chicago Style (17a ed.)Schweingruber, Fritz Hans, y Margrit Brunner. Tree-ring Measurements of Picea Engelmannii (Engelmann Spruce) from Sample COTTON-81. PANGAEA, 2007.
Cita MLA (9a ed.)Schweingruber, Fritz Hans, y Margrit Brunner. Tree-ring Measurements of Picea Engelmannii (Engelmann Spruce) from Sample COTTON-81. PANGAEA, 2007.
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