مؤلف: Michael O Keeffe

Since its limited release just after the turn of the twentieth century, this American Tobacco cigarette card has beguiled and bedeviled collectors. First identified as valuable in the 1930s, when the …

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Structure and Bonding in Crystals presents a new understanding of the older topics such as bond length, bond strength, and ionic radii. These concepts have been used by geochemists and geophysicists …