1. American Association for the Advancement of Science 1957 Training for Secondary School Teachers of Mathematics and Science http://archives.aaas.org/docs/resolutions.php?doc_id=253
2. Discovery or invention?;Atkin;The Science Teacher,1962
3. A brief history of inquiry: From Dewey to standards;Barrow;Journal of Science Teacher Education,2006
4. Giant camera to photo Russ satellite unveiled: 10-foot-high apparatus first of 12 designed for world-wide IGY watching;Berry;Los Angeles Times,1957