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Wildlife Review
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Biological and Physical Aspects of Dredging, Kings Bay, Georgia
This proceedings contains papers presented at the specialty conference Stat end Local Issues in Transportation of Hazardous Materials: Toward a National Strategy held on May 14-16, 1990 in St. Louis, Missouri. The papers span a wide spectrum of technical, regulatory, and policy aspects of hazardous materials transportation. The papers are organized into the following five thematic areas: 1) legislative issues, 2) risk perception, 3) database development, 4) risk assessment/routing, and 5) risk management and advanced technologies. Within these broad categories, such topics as the need for local control, the design of protective systems into highways systems, the use of information to assess accident trends, the importance of individual and societal risk analysis in decision making, and the development of computer software to assist in routing hazardous materials are explored.
ASCE Combined Index
Indexes materials appearing in the Society's Journals, Transactions, Manuals and reports, Special publications, and Civil engineering.
Coastal Zone ...
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Coastal Zone '91
Coastal Zone '91 is the seventh in a series of biennial multidisciplinary symposia on comprehensive coastal and ocean management. The papers included in this proceedings review technical knowledge and current practice for the improvement of planning, environmental considerations, design, development, and conservation actions related to coasts, wetlands, and oceans. These topics are addressed from different points of view: engineering and science; data gathering and monitoring; legal, regulatory and political aspects of coastal management; planning, conservation and development; and public information and citizen participation. This proceedings will help to diffuse technical knowledge and current practice for the improvement of planning, design, development and conservation actions relating to our coasts and oceans.
Sirenews
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Ontogeny, Intraspecific Variation, and Systematics of the Late Cambrian Trilobite Dikelocephalus
Biometric analyses of well-localized specimens of the trilobite Dikelocephalus from the St. Lawrence Formation (Upper Cambrian), northern Mississippi Valley, suggest that all specimens belong to a single, highly variable morphospecies, D. minnesotensis. A complex pattern of ontogenetically-related and ontogeny-independent variation produced a mosaic of morphotypes, which show greater diversity than previously recorded within trilobite species. There is considerable variation within collections made from single beds. Variations of characters among collections are mosaic, and are clinal in some cases. Patterns of variation within Dikelocephalus cannot be related to lithofacies occurrence. Ther...
