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}
@article {2804,
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@article {2803,
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@article {2797,
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	author = {Valkeila, E.}
}
@article {2574,
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@article {1492,
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	journal = {Notulae Entomologicae},
	volume = {37},
	year = {1957},
	pages = {33-52},
	keywords = {pdf},
	author = {H{\'e}llen, W.}
}
@article {1466,
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	volume = {30},
	year = {1950},
	pages = {1-5},
	keywords = {pdf},
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@article {1430,
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	author = {H{\'e}llen, W.}
}
@article {1104,
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	year = {1999},
	pages = {191{\textendash}197},
	keywords = {pdf},
	author = {Pekkarinen, A. and Gustafsson, B.}
}
@article {1086,
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	year = {1973},
	pages = {12{\textendash}19},
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@article {980,
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	volume = {15},
	year = {1949},
	pages = {101-120},
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@article {762,
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	journal = {Notulae Entomologicae},
	volume = {7},
	year = {1927},
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@article {761,
	title = {Om Mutilla europaea L. i Finland},
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	volume = {7},
	year = {1927},
	pages = {90-91},
	keywords = {pdf},
	author = {Forsius, R.}
}
@article {749,
	title = {Die Bienen Finnlands},
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	year = {1968},
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	keywords = {pdf},
	author = {Elfving, R.}
}
@article {89,
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	journal = {Lounais-H{\"a}meen Luonto},
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	pages = {61-62},
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@article {62,
	title = {Suomen kimalaisista ja loiskimalaisista (On Finnish bumblebees and cuckoo bumblebees (Apidae))},
	journal = {Luonnon Tutkija},
	volume = {81},
	year = {1977},
	pages = {1-24},
	keywords = {Aculeata, Apidae, Bombus, pdf},
	author = {Pekkarinen, A. and Ter{\"a}s, I.}
}
@article {52,
	title = {Phenological spread in flowering of bumblebee-pollinated plants},
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	year = {1981},
	pages = {229-236},
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	author = {Ranta, E. and Ter{\"a}s, I. and Lundberg, H.}
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@article {51,
	title = {Distribution of bumble-bees (Hymenoptera, Apidae: Bombus and Psithyrus) in Eastern Fennoscandia.},
	journal = {Notulae Entomologicae},
	volume = {61},
	year = {1981},
	pages = {71-89},
	keywords = {Aculeata, Apidae, Bombus, pdf},
	author = {Pekkarinen, A. and Ter{\"a}s, I. and Viramo, J. and Paatela, J.}
}
