421
by Peck, Bob
Published 1992
British Broadcasting Corporation (BBC)

422
by Balmès, Thomas
Published 2000
Filmakers Library

423
by Webber, Joel
Published 2007
Addison-Wesley

424
by Dayal, Rajeev
Published 2007
Addison-Wesley

425
by Cromwell, Ray
Published 2007
Addison-Wesley

429
by Guha-Khasnobis, Basudeb
Published 2007
Oxford University Press
Subjects: ...Produce trade / Developing countries...

430
by Alexander, William
Published 1771
printed for T. Becket and P.A. de Hondt, and T. Cadell, in the Strand

431
by Hunt, Thomas
Published 1840
B.D. Cousins
...Which is the best calculated to produce permanent relief to the working classes?...

432
by Gardner, Robert
Published 2005
Documentary Educational Resources

436
Published 1989
The Institute of Electrical and Electronics Engineers, Inc.