Schweingruber, F. H., & Keller, R. (2007). Tree-ring measurements of Picea obovata (Sibirean spruce) from sample KOTUYPCO-23. PANGAEA.
Citazione stile Chigago Style (17a edizione)Schweingruber, Fritz Hans, e Regula Keller. Tree-ring Measurements of Picea Obovata (Sibirean Spruce) from Sample KOTUYPCO-23. PANGAEA, 2007.
Citatione MLA (9a ed.)Schweingruber, Fritz Hans, e Regula Keller. Tree-ring Measurements of Picea Obovata (Sibirean Spruce) from Sample KOTUYPCO-23. PANGAEA, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.