Schools Council, Nuffield Foundation, Nuffield Foundation, & Scottish Education Department. (1973). Holes, gaps and cavities ; stages 1 & 2: A unit for teachers. MacDonald Educational.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchools Council, Nuffield Foundation, Nuffield Foundation, और Scottish Education Department. Holes, Gaps and Cavities ; Stages 1 & 2: A Unit for Teachers. London: MacDonald Educational, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSchools Council, Nuffield Foundation, et al. Holes, Gaps and Cavities ; Stages 1 & 2: A Unit for Teachers. MacDonald Educational, 1973.
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