TY  - BOOK
AU  - Preller,S.J.
AU  - Hattingh,C.
AU  - Bredell,H.C.
TI  - General science for standards VII and VIII: covering the new T.E.D. syllabus for differentiated secondary education 
PY  - 1960///]
CY  - Johannesburg
PB  - Voortrekkerpers
ER  -