“Reading of the «invar» wire in an intermediate iron tube”. Geodesic Mission São Tomé Island. CMG Gago Coutinho, Head of Mission 1915-1918.
2020 03 06
2020 03 06
“Reading of the «invar» wire in an intermediate iron tube”. Geodesic Mission São Tomé Island. CMG Gago Coutinho, Head of Mission 1915-1918.
