![Methods of test for sodium tripolyphosphate (penta sodium triphosphate) and sodium pyrophosphate (tetra sodium pyrophosphate) : [metric units]. Part 3, Determination of iron content](/img/books.png)
Methods of test for sodium tripolyphosphate (penta sodium triphosphate) and sodium pyrophosphate (tetra sodium pyrophosphate) : [metric units]. Part 3, Determination of iron content by British Standards Institution. ISBN 0580053962. Published by B.S.I in 1969. Publication and catalogue information, links to buy online and reader comments.