Reference:R-1: The "Old Campaigner"

From OnAirpower.org

R-1: The "Old Campaigner"

Full Title: R-1: The "Old Campaigner" (Старый Служака Р-1) Author: Maslov, Mikhail A.; Anderson, Lenart Published In: Aviatsiya i Vremya Volume: 2001 No. 4 Read Online: Subjects: R-1 Remarks: Examines the development and use of the R-1 biplane by the Soviet air forces