Birkenstock, J. F.
New physical science : prepared for standard six pupils in technical high schools / J.F. Birkenstock, W.H. Boshoff. - Johannesburg : Voortrekkerpers, 1969. - 221 p. : ill., ports. ; 25 cm.
Includes index.
Physics--Study and teaching (Secondary)--South Africa.
Chemistry--Study and teaching (Secondary)--South Africa.
530.71
New physical science : prepared for standard six pupils in technical high schools / J.F. Birkenstock, W.H. Boshoff. - Johannesburg : Voortrekkerpers, 1969. - 221 p. : ill., ports. ; 25 cm.
Includes index.
Physics--Study and teaching (Secondary)--South Africa.
Chemistry--Study and teaching (Secondary)--South Africa.
530.71