Heaton, W. R.
Farming calcultions / Textual Documents W.R.Heaton. - London : Sir Isaac Pitman and Sons Limited, 1948. - xii, 172 p., - Pitman farming books .
Agric, Economics Calcultions-Farming
338.1 / HEA
Farming calcultions / Textual Documents W.R.Heaton. - London : Sir Isaac Pitman and Sons Limited, 1948. - xii, 172 p., - Pitman farming books .
Agric, Economics Calcultions-Farming
338.1 / HEA