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- catalog contributor b7377571.
- catalog contributor b7377572.
- catalog created "[c1961]".
- catalog date "1961".
- catalog date "[c1961]".
- catalog dateCopyrighted "[c1961]".
- catalog extent "115 p. :".
- catalog hasFormat "World of teaching machines.".
- catalog isFormatOf "World of teaching machines.".
- catalog issued "1961".
- catalog issued "[c1961]".
- catalog language "eng".
- catalog publisher "Washington : Teaching Research and Technology Division, Electronic Teaching Laboratories,".
- catalog relation "World of teaching machines.".
- catalog subject "371.3944".
- catalog subject "LB1029.A85 F58".
- catalog subject "Teaching Aids and devices.".
- catalog subject "Teaching machines.".
- catalog title "The world of teaching machines : programed learning and self-instructional devices.".
- catalog type "text".