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A certified reference material is a particular form of measurement standard. Reference materials are particularly important for analytical chemistry and clinical analysis. [2] Since most analytical instrumentation is comparative, it requires a sample of known composition (reference material) for accurate calibration.
In contrast to books that are loaned, a reference book or reference-only book in a library may only be used in the library and may not be borrowed from the library. Many such books are reference works (in the first sense), which are usually used briefly or photocopied from and, therefore, do not need to be borrowed.
The δ values and absolute isotope ratios of common reference materials are summarized in Table 1 and described in more detail below. Alternative values for the absolute isotopic ratios of reference materials, differing only modestly from those in Table 1, are presented in Table 2.5 of Sharp (2007) [1] (a text freely available online), as well as Table 1 of the 1993 IAEA report on isotopic ...
A reference collection is a collection of objects maintained for the purposes of study, comparison, research, and authentication. [1] While most commonly associated with libraries, reference collections can also be found in museums, archives, research institutions, and private holdings.
A drug reference standard or pharmaceutical reference standard is a highly characterized material suitable to test the identity, strength, quality and purity of substances for pharmaceutical use and medicinal products.
A general reference is a citation that supports content, but is not linked to any particular piece of material in the article through an inline citation. General references are usually listed at the end of the article in a References section.
Place the reference material you are referring to after the completed {{note}} template, and ensure that the {{ref}} and {{note}} templates are correctly linking to each other by checking the spelling. There are several templates that can help with the citation format. For example, the full reference for the Navy citation should read as follows:
xkcd webcomic titled "Wikipedian Protester". The sign says: "[CITATION NEEDED]".[1]A citation is a reference to a source. More precisely, a citation is an abbreviated alphanumeric expression embedded in the body of an intellectual work that denotes an entry in the bibliographic references section of the work for the purpose of acknowledging the relevance of the works of others to the topic of ...