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100 Colones Native American Gold Art .900 gold and .100 copper 14.9g 3,507 proof 200 Colones Juan Santamaria, National Hero of 1856 .900 gold and .100 copper 29.8g 3,507 proof [3] 500 Colones 100th Anniversary of Public Education .900 gold and .100 copper 74.52g 3,507 proof 1,000 Colones Independence of Central America, 1821- September 15, 1971
The handbook was originally published in 1928 by the Chemical Rubber Company (now CRC Press) as a supplement (Mathematical Tables) to the CRC Handbook of Chemistry and Physics. Beginning with the 10th edition (1956), it was published as CRC Standard Mathematical Tables and kept this title up to the 29th edition (1991).
CRC (numeric: 188) Subunit: 0.01: Unit; Plural: colones: Symbol ₡ Denominations; Subunit 1 ⁄ 100: céntimo (out of circulation) Banknotes Freq. used ₡1 000, ₡2 000, ₡5 000, ₡10 000, ₡20 000 Rarely used ₡50 000 (Withdrawn, still exchangeable at Banco de Costa Rica) Coins Freq. used ₡10, ₡25, ₡50, ₡100, ₡500 Rarely used
50 Colones D 18 March 1980 #14 Rigoberto Navarro Meléndez [7] [8] 50 Colones D 2 April 1981 #21 Rigoberto Navarro Meléndez [7] [8] 50 Colones D 18 May 1982 #1 Carlos Manuel Castillo Morales Rigoberto Navarro Meléndez [7] [8] 50 Colones D 28 August 1984 #4 Marco Antonio López Agüero Olivier Castro Pérez [7] [8] 50 Colones D 22 November 1984 #2
The calculations to convert measured data to an estimate of the age of the sample require the use of several standards. One of these, the standard for normalizing δ 13 C values, is Pee Dee Belemnite (PDB), a fossil which has a 13 C / 12 C ratio of 1.12372%.
Uncalibrated dates may be stated as "radiocarbon years ago", abbreviated " 14 C ya". [3] The term Before Present (BP) is established for reporting dates derived from radiocarbon analysis, where "present" is 1950. Uncalibrated dates are stated as "uncal BP", [4] and calibrated (corrected) dates as "cal BP". Used alone, the term BP is ambiguous.
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the Costa Rican colón (CRC), used in Costa Rica since 1896 the Salvadoran colón (SVC), used in El Salvador from 1892 until 2001, when it was replaced by the American dollar Symbol