The measurement of soil moisture and density by neutron and gamma-ray scattering,

Cover title.

Airport drainage.

"This publication supersedes 'Airport drainage,' dated November 1956."

The human equation in aircraft accidents; an analysis of 758 fatal accidents charged to "pilot error" which occurred in non-air carrier flying during the year 1948.

Mode of access: Internet.

Productivity and cost of employment, system trunks, calendar years 1974 and 1975 /

Tables.

Airworthiness directive summary. Jan.1, 1950.

Cover title.

Obstruction marking manual /

"June 1, 1941."

Maintenance, repair and alteration of certified aircraft, aircraft engines, propellers and instruments.

Mode of access: Internet.

Alaska flight information manual.

Corrected to include Alaska airman's guide.

Pilots' powerplant manual,

At head of title: United States Dept. of commerce. Civil aeronautics administration, Washington, D.C.

A program of charges for the use of the Federal airways system;

Mode of access: Internet.

Transport airplane accidents, hazards and malfunctions, scheduled domestic and foreign/overseas passenger operations, July 1, 1947 through December 31, 1954.

Cover title.

Hours flown in general aviation,

Mode of access: Internet.

Undershoot accidents in U. S. scheduled and irregular air carrier operations; transport type aircraft, 1946-1955.

Mode of access: Internet.

Legislative history of regulations /

Looseleaf for updating.

Title 38--United States code: Veterans' benefits. : January 3, 1973.

"Soldiers' and sailors' civil relief act of 1940, as amended": p. 311-330.