George Frederick Barker

A Text Book of El...
Barker, George Fred...
Hardback: $33.99

Rontgen Rays
Barker, George Fred...
Hardback: $21.95

A Text-Book of El...
Barker, George Fred...
Hardback: $27.95

Memoir of Henry D...
Barker, George Fred...
Hardback: $31.95

The Forces of Nat...
Barker, George Fred...
Paperback: $31.17

A Text-Book of El...
Barker, George Fred...
Paperback: $32.75

Röntgen Rays
Barker, George Fred...
Hardback: $21.95

A Text Book of El...
Barker, George Fred...
Hardback: $38.99

Memoir of John Wi...
Barker George Frede...
Paperback:

An Account of the...
Barker, George Fred...
Paperback:

Röntgen Rays
Barker, George Fred...
Paperback: $18.75

Memoir of John Wi...
Barker, George Fred...
Paperback: $7.97