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  • 1
    Electronic Resource
    Electronic Resource
    The Cereal Leaf Beetle in North America (1981)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Entomology 26 (1981), S. 259-287 
    Details
    ISSN: 0066-4170
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.en.26.010181.001355
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Variability and trends of corn heat units on the Canadian prairies (1978)
    Springer
    International journal of biometeorology 22 (1978), S. 235-241 
    Details
    ISSN: 1432-1254
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Seasonal accumulations of corn heat units were calculated from temperature records of 85 stations in Alberta, Saskatchewan, and Manitoba. The number of years of data varied from 16 to 72. The objectives of the study were to determine how many years of data were necessary to obtain a reliable estimate of CHU for each station and to examine possible CHU trends with time. Stein's two-stage sampling technique was used to show that about 20 years of data should be used to obtain a reliable estimate of the location mean. When years were taken at random, the number of years of data needed for a location was larger than when taken in sequence. Statistically significant indications of trends in CHU with time were found for only about 11% of the stations. Year-to-year variability was considerably greater than any possible trends in the last half-century. Means and standard errors of the deviations from the 30-year mean (1943–1972) were calculated for all stations. Although these data were not independent because of their geographic proximity, there was an indication that CHU totals have changed in the past half-century. However, future changes in the CHU totals could not be predicted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01552804
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The relation of teacher and publisher (1907)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 1 (1907), S. 179-200 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1090010705
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    Paper (German National Licenses)
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