![Calcium Metal Element 20 Sample, 99.9% Pure 1 Gram Shiny Piece Under Mineral Oil in Labeled Glass Vial: Amazon.com: Industrial & Scientific Calcium Metal Element 20 Sample, 99.9% Pure 1 Gram Shiny Piece Under Mineral Oil in Labeled Glass Vial: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/81xsae0uioL._AC_UF1000,1000_QL80_.jpg)
Calcium Metal Element 20 Sample, 99.9% Pure 1 Gram Shiny Piece Under Mineral Oil in Labeled Glass Vial: Amazon.com: Industrial & Scientific
![Semimetal Boron 0.5g 99.9% Crystals in Labeled Glass Vial, Element 5 of The Periodic Table: Amazon.com: Industrial & Scientific Semimetal Boron 0.5g 99.9% Crystals in Labeled Glass Vial, Element 5 of The Periodic Table: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/510qgwKPc7L._AC_UF1000,1000_QL80_.jpg)
Semimetal Boron 0.5g 99.9% Crystals in Labeled Glass Vial, Element 5 of The Periodic Table: Amazon.com: Industrial & Scientific
![Sodium Metal Element 11 Sample, 99.8% Pure 1 Gram Under Mineral Oil Inside a Labeled Glass Vial…: Amazon.com: Industrial & Scientific Sodium Metal Element 11 Sample, 99.8% Pure 1 Gram Under Mineral Oil Inside a Labeled Glass Vial…: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/81IOnBIkIFL._AC_UF1000,1000_QL80_.jpg)
Sodium Metal Element 11 Sample, 99.8% Pure 1 Gram Under Mineral Oil Inside a Labeled Glass Vial…: Amazon.com: Industrial & Scientific
![PDF) Mid- to Late-Holocene Fluvial Activity behind pre-Columbian Social Complexity in the Southwestern Amazon Basin PDF) Mid- to Late-Holocene Fluvial Activity behind pre-Columbian Social Complexity in the Southwestern Amazon Basin](https://i1.rgstatic.net/publication/235345595_Mid-_to_Late-Holocene_Fluvial_Activity_behind_pre-Columbian_Social_Complexity_in_the_Southwestern_Amazon_Basin/links/02e7e536c81415fd5d000000/largepreview.png)