Schweingruber, F. H., & Kienast, F. (2007). Tree-ring measurements of Picea abies (Norway spruce) from sample CR-131. PANGAEA.
Cita Chicago Style (17a ed.)Schweingruber, Fritz Hans, y Felix Kienast. Tree-ring Measurements of Picea Abies (Norway Spruce) from Sample CR-131. PANGAEA, 2007.
Cita MLA (9a ed.)Schweingruber, Fritz Hans, y Felix Kienast. Tree-ring Measurements of Picea Abies (Norway Spruce) from Sample CR-131. PANGAEA, 2007.
Precaución: Estas citas no son 100% exactas.