National Science Teachers Association & Richardson, J. S. 1. e. (1954). School facilities for science instruction: Philip G. Johnson, chairman, Robert H. Carlton [and others]. s.n.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Science Teachers Association και John Sanford 1908- ed Richardson. School Facilities for Science Instruction: Philip G. Johnson, Chairman, Robert H. Carlton [and Others]. Washingon: s.n, 1954.
Παραπομπή σε μορφή MLA (9th εκδ.)National Science Teachers Association και John Sanford 1908- ed Richardson. School Facilities for Science Instruction: Philip G. Johnson, Chairman, Robert H. Carlton [and Others]. s.n, 1954.
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