The physical world /
Branley, Franklyn M..
The physical world / Franklyn M. Branley, Milton O. Pella, John Urban. - Boston : Ginn and Company, 1965. - 264 pages : illustrations ; 24 cm. - Science horizons .
Science--Study and teaching.
The physical world / Franklyn M. Branley, Milton O. Pella, John Urban. - Boston : Ginn and Company, 1965. - 264 pages : illustrations ; 24 cm. - Science horizons .
Science--Study and teaching.
