Pbk. £1.00. sbn 245-50302-1.
Originally published as 'O Lenine: materialy dlia biografa'. Moscow: Gosudarstvennoe Izdatel'stvo, 1924.
On Lenin : notes towards a biography by Leon Trotsky. ISBN 0245503013. Published by Harrap in 1971. Publication and catalogue information, links to buy online and reader comments.