@article {1370,
	title = {Mehil{\"a}isrotujen ty{\"o}skentely puna-apilalla siitep{\"o}lytutkimusten perusteella. },
	journal = {Acta Agr. Fenn.},
	volume = {113},
	year = {1969},
	pages = {1-13},
	author = {Sarisalo, M. and Valle, O.}
}
@article {1248,
	title = {Havaintoja puna-apilan p{\"o}lytyssuhteista},
	journal = {Pellervo},
	volume = {35},
	year = {1934},
	pages = {911-914},
	author = {Valle, O.}
}
@article {1247,
	title = {Unders{\"o}kningar {\"o}ver kl{\"o}verarternas pollination och fr{\"o}bildning.},
	journal = {N. J. F.s Kongres i K{\"o}benhavn},
	volume = {1935},
	year = {1935},
	pages = {1-9},
	author = {Valle, O.}
}
@article {1246,
	title = {De olika hummelarternas samt binas betydelse f{\"o}r r{\"o}dkl{\"o}verns pollination},
	journal = {Annales Entomologici Fennici (Suppl.)},
	volume = {14},
	year = {1949},
	pages = {225-231},
	author = {Valle, O.}
}
@article {1245,
	title = {Untersuchungen zur sicherung der Best{\"a}ubung von Rotklee},
	journal = {Acta Agric. Fennica},
	volume = {83},
	year = {1955},
	pages = {205-220},
	author = {Valle, O.}
}
@article {1244,
	title = {Kimalaiset ja mehil{\"a}iset puna-apilan p{\"o}lytt{\"a}jin{\"a}. },
	journal = {Maatalous ja koetoiminta 13: 227-237},
	volume = {13},
	year = {1959},
	pages = {227-237},
	author = {Valle, O.}
}
@article {1243,
	title = { Pollination and seed setting in tetraploid red clover in Finland},
	journal = {Acta Agric. Fennica},
	volume = {95},
	year = {1959},
	pages = {1-35},
	author = {Valle, O.}
}
@article {1242,
	title = {Experiences with pollination studies on tetraploid red clover in Finland},
	journal = {Bee World},
	volume = {47},
	year = {1966},
	pages = {63-69},
	author = {Valle, O.}
}
@article {1241,
	title = {Honeybees as pollen and nectar collectors in red clover.},
	journal = {Annales Acad. Sci. Fenn. Ser. A, IV. Biologica},
	volume = {91},
	year = {1965},
	pages = {15 s},
	author = {Valle, O. and Bergt, K.}
}
@article {1240,
	title = {The possibilities of seed production of tetraploid red clover in Central Finland},
	journal = {Ann. Agric. Fenniae},
	volume = {3},
	year = {1964},
	pages = {80-94},
	author = {Valle, O. and Huokuna, E. and Puumalainen, T.}
}
@article {1239,
	title = {Pollination and seed setting in tetraploid red clover in Finland II.},
	journal = {Acta Agric. Fennica},
	volume = {97},
	year = {1960},
	pages = {1-64},
	author = {Valle, O. and Salminen, M. and Huokuna, E.}
}
@article {1238,
	title = {Pollination studies on red clover in Finland},
	journal = {Medd. Sv. Fr{\"o}odlaref{\"o}rbund},
	volume = {7},
	year = {1962},
	pages = {106-113},
	author = {Valle, O. and Sarisalo, M. and Paatela, J.}
}
