No cell phones, no roving mechanics in this country. The truck breaks and thesurveyors have to fix it. Gravity observation party in Washington state.
4/3/2019 2:12:46 PM
Photographer: Rear Admiral Harley D. Nygren
Affiliation: NOAA Corps (ret.)
Date: 1948 December
Subject: Geophysics Gravity
Subject: Getting There Trucks