Donald Jenks Belcher

Perspective Analysis of the Proposed Alpa Approach Light System

A Supplement to Technical Development Report No. 96, Perspective Analysis of Light Patterns

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The Measurement of Soil Moisture and Density by Neutron and Gamma-ray Scattering

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A Field Investigation of Low-cost Stabilized Roads

A Progress Report of an Investigation

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The Formation, Distribution, and Engineering Characteristics of Soils

A Report of an Investigation Conducted by the Engineering Experiment Station, Purdue University, in Co-operation with the State Highway Commission of Indiana

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