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991.
992.
Abstract The Bills of Mortality for London were instituted at least as early as 1528 but only a few figures survive before the extant annual series that begins in 1603. Ages at death, even in broad groups of ages, are not generally available until 1728, which is more than 50 years too late to give us any inkling of the ages, if any, at which people were specially susceptible to plague. There are reports, it is true, that suggest that children suffered from plague more severely than adults, at least on certain occasions (as in 1361 or 1418 for example), but nothing more precise. The legend of the Pied Piper of Hamelin may be a folk-memory of a plague (possibly in 1284) that killed mainly the children of the town, for the connection between infestation of rats and the loss of children suggests some kind of plague outbreak. Pollitzer concludes that no particular age group is specially liable to plague, and attributes all differences observed to different risks of exposure. The determinants of the severity of an outbreak would therefore be the environmental details and social customs.  相似文献   
993.
994.
The 1970 census included numerous procedural innovations, of which the most important was the use of mail-out/mail-back techniques. A statewide survey of Wisconsin households (conducted in May and June, 1970) included questions designed to elicit information on the degree of cooperation rendered, ease of comprehension of the form, possible objectionable items on the census, whether or not contacts were made by enumerators, and respondent judgments of the adequacy of enumerators’ performance. The results indicate that Wisconsin respondents tended to comply with census procedures, that they found very little difficulty in filling out the mailed forms, and that they regarded the census enumerators as doing a “good job” in most cases.  相似文献   
995.
A technique for deriving asymptotic expansions for the variances of the errors of misclassification of the linear discriminant function (Anderson's classification statistic) is developed. These expansions are shown to be in reasonable agreement with the sample values of the variances of the errors obtained from some sampling experiments.  相似文献   
996.
997.
Luthman, S. G., & Kirschenbaum, M. The Dynamic Family .
Stapleton, J., & Bright, R. Equal Marriage .  相似文献   
998.
A family-based, multi-system intervention is described as a response to three years of an adolescent's school failure. In a case study describing an unmotivated family, unmotivated school, and systems-oriented helpers, an intervention plan is developed that is directed toward improving the adolescent's school behavior and performance. Family therapy occurred concurrently with those interventions. A family-trained psycho educational consultant is employed to mediate between family and school to avoid disturbing the integrity of the therapists relationship with the family. Short-term effects of these procedures are described.  相似文献   
999.
1000.
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