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How to find out / by Lionel McColvin.
- 028.7 M1293 1947
- McColvin, Lionel Roy, b. 1896.
- Pub. for the National Book League by Cambridge Univ. Press,
- 1947.
- London :
-
An introduction to agricultural chemistry / by Norman M. Comber, J.S. Willcox, and W.N. Townsend.
- 631.8 C729
- Comber, Norman Mederson, 1888-1953.
- Edward Arnold,
- 1947.
- London :