Catalog of information on water data : index to water-data activities in coal provinces of the United States /

Maps on lining papers.

Fitting curves to cyclic data /

Mode of access: Internet.

The physico-chemical properties of plant saps in relation to phytogeography; data on native vegetation in its natural environment

Foreword signed: George O. Burr, Ross Aiken Gortner, C. O. Rosendahl, chairman.

The 1970 census and you : a general introduction to census data.

Mode of access: Internet.