with addresses, phone numbers, to-do- and do-not-forget lists

for Ershov visit

for Ershov visit

of A.P. Ershov's visit to the UK with his handwritten notes

handwritten notes, and a business card

about the visit of A.P. Ershov to the United Kingdom as a guest of the British Computer Society

Address of MacCallum family with Ershov's notes made after the visit

Plane ticket, receipt stub, customs certificate for importing 8 pounds