TY - BOOK TI - Primary science - taking the plunge : how to teach primary science more effectively / edited by Wynne Harlen ; authors Jos Elstgeest ... (et al.). A2 - Harlen, Wynne A2 - Elstgeest, Jos CY - London PB - Heinemann Educational PY - 1985 LA - English SN - 0435573500 ER -