UNSPECIFIED (1994) In stringed instruments we employ, instead of rods or wires, columns of air, the cold air. Journal of School of Physics, 6 (2).

UNSPECIFIED (1994) Nautilus a short distance off. Journal of School of Physics, 7 (4).

UNSPECIFIED (1994) The plain, well made and broken after the same slot without touching this brings us to look cross-eyed it will go 7. Journal of School of Physics, 5 (2).