These two books register the Specimen Number collected which is proceeded by the two digit year abreviation and flollowed by a / with the specimen number for that year.
The regiters display, the BYM Specimen number or BYM Field Note Number, Exact Location of the collection, Collector, Identity of the specimen , remarks and sex of the specimen.
Volume 1 - 1937 - 1962
Volume 2 - 1962- 2013
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