Sentence examples for surveys are needed from inspiring English sources
Perhaps other political opinion surveys are needed.
More random sample surveys are needed from more countries.
German and Namibian scientists who are mapping the groundwater source estimate that it covers 15,000km² – half the size of Belgium, although they say more surveys are needed to establish the aquifer's true size and potential.
The IUCN acknowledges that this rating stems from the results of a few small-scale population surveys, whose mathematical extrapolations suggest that the species has experienced a rapid decline in population since the 1970s, and that wider population surveys are needed to produce more accurate estimates.
Extensive surveys are needed to model such large-scale problems, with their success dependent on adequate sampling protocols.
It is possible that cracks and damages measured in this field survey may not always represent the averaged ground displacements within a multi-looked pixel resolution, and more field surveys are needed to evaluate the estimated deformation amount.
Kazama and Okubo (2009) and Naujoks et al. (2010) calculated the water distribution around a gravity observation point such that hydro-logical simulations based on both hydrogeological observations and subsurface-structure assumptions and surveys were needed.
Moreover, a more coordinated effort to gather this information using short, valid surveys is needed in Canada but also internationally.
Further research utilising a shorter time period between initial and follow-up surveys is needed to confirm the test-retest reliability of the SUNS for haematological cancer survivors.
Measurement of the severity of all AOM episodes and QOL consequences through telephone surveys is needed to assess the benefits of preventive interventions, including immunization programs against viral and bacterial infections.
A national survey is needed to generate the needed evidence for the planning of community relevant responses to the national caries epidemic in children.
