Instructions f. collectors
[British Museum (Natural History)]
[by B. H. Cogan and K. G. V. Smith]
British Museum (Natural History) 1974 5th ed. Instructions f. collectors no. 4a
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compiled by John Smart
printed by order of the Trustees of the British Museum 1940 Instructions f. collectors no. 4a
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[British Museum (Natural History)] [1907?] Instructions f. collectors no. 7