Rezultaty - Simpson, O. J. (Oswald John)

Multiple choice chemistry over 1000 factual, reasoning and analytical questions od Simpson, O. J. (Oswald John)

Basic chemical calculations for first examinations / od Simpson, O. J. (Oswald John)

Practice questions in chemistry : 700 objective-type items and revision exercises / od Simpson, O. J. (Oswald John)

Structured items for O-Level chemistry od Borrows, T. P.

Kolejni autorzy: “…Simpson, O. J. (Oswald John)…”