Tabulation showing locations of subways and highway bridges with posted loads and limited vertical and horizontal clearances on marked U.S., interstate and Illinois state routes /

Cover title: Vertical and horizontal clearances of structures.

On the necessary condition for optimal control of nonlinear systems.

"Prepared under contract Nonr-225(11) (NR-041-086) for Office of Naval Research."

Effect of environment on glycoalkaloid content of six potato varieties at 39 locations /

Bibliography: p. 25-27.

The detection of interaction effects ; a report on a computer program for the selection of optimal combinations of explanatory variables /

Errata sheet inserted.