Wheldon's Costing SimplifiedL. W. Owler, Harold J. Wheldon, J. L. Brown · First published 1978Open the Tome
Wheldon's business statistics and statistical methodHarold J. Wheldon · First published 1962Open the Tome
Business statistics and statistical methodHarold J. Wheldon · First published 1944 · Latest edition 1945Open the Tome