Editing Keypunch (section)

==Further reading==
* [http://www.columbia.edu/cu/computinghistory/keypunch.html Columbia University Computing History: IBM Key Punches]
*{{cite book
  |last =IBM
  |title = IBM Accounting Machines, Electric Punch Type 011, Customer Engineering Manual of Instruction
  |date = n.d.
  |url =http://www.ed-thelen.org/comp-hist/IBM-011-ElectricPunch-ServiceManual.pdf
 }}
*{{cite book
  |last =IBM
  |title = Reference Manual: IBM 24 Card Punch, IBM 26 Printing Card Punch
  |date=December 1964
  | id = A24-0520-2
  |url = http://www.bitsavers.org/pdf/ibm/punchedCard/Keypunch/A24-0520-2_24-26_Keypunches.pdf
 }}
*{{cite book
  |last =IBM
  |title = Reference Manual—IBM 29 Card Punch
  |date = June 1970
  | id = GA24-3332-6
  |url = https://www.masswerk.at/keypunch/manuals/IBM029-GA24-3332-6_Reference_Manual_Model_29_Card_Punch_Jun70.pdf
 }}
*{{cite book
  |last =IBM
  |title = IBM Field Engineering Maintenance Manual—29 Card Punch
  |year=  1969
  | id = S225-3357-3
  |url = http://www.ed-thelen.org/comp-hist/IBM029-Field-Eng-Maint-Man-r.pdf
 }}
*{{cite book
  |last =IBM
  |title = Reference Manual: IBM 056 Card Verifer
  |date=December 1962
  | id = A24-1018-1
  |url =http://www.bitsavers.org/pdf/ibm/punchedCard/Verifier/A24-1018-1_56_Verifier.pdf
 }}