Accuracy in trace analysis : sampling, sample handling, analysis : proceedings of the 7th Materials Research Symposium held at the National Bureau of Standards, Gaithersburg, Md., October 7-11, 1974 /

Includes bibliographical references.

Evaluation and research program of the U.S. censuses of population and housing, 1960 : accuracy of data on housing characteristics.

Mode of access: Internet.

Evaluation and research program of the U.S. censuses of population and housing, 1960 : accuracy of data on population characteristics as measured by reinterviews.

Mode of access: Internet.