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References
- ↑ For the Future, a Household Computer. House & Garden. Vol. 130. Condé Nast Publications. Jul 1966. p. 30.
- "Basement computer". Electronic Industries. 26 (1): 36. 1967.
- ACS Newsletter
- The Computer Museum Report 1985
- 1 2 3 4 Tomayko 1994.
- 1 2 3 Cortesi 2015, p. 2.
- ↑ "The Family of The Future with their Computer". cortesi.smugmug.com.
- 1 2 3 4 The ECHO IV Home Computer: 50 Years Later.
- ↑ "The End Bit: ECHO IV". The Computer Museum Report. 14 (Fall/Winter): last page. 1985.
- 1 2 Cortesi 2015, p. 3.
- ↑ "ECHO 14 Plug-in Module". cortesi.smugmug.com. pp. 5–6.
- ↑ Living with ECHO-IV, 21:46.
- 1 2 3 "ECHO-4". Amateur Computer Society Newsletter (8): 4 (49). Jan 1968. 102654910.
- ↑ Libes, Sol (July 1978). "Background: The First Ten Years of Amateur Computing". Byte Magazine. 3 (7): 64.
- ↑ Tomayko 1994, p. 61.
- 1 2 Tomayko 1994, p. 60.
- ↑ Infield 1968, p. 79, 209.