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image no.: 61773
contact sheet: A1972
collection: Canadian Grain Commission
description: Map Showing Exclusion Of Grain Research Laboratory Districts Producing Wheat Below Specified Protein Levels, From 1947 - 1966.
subject(s): Agriculture ▪ Crops ▪ Grain Commission ▪ Laboratories ▪ Maps ▪ Research ▪ Wheat
date: 1947...1966