@article {1055,
	title = {Die Ausbeute der deutschen Chaco-Expedition 1925/26. - Diptera. (Fortsetzung) XXIX. Pipunculidae},
	journal = {Konowia},
	volume = {10},
	year = {1931},
	pages = {171-176},
	address = {Vienna},
	keywords = {Pipunculidae},
	author = {Collin, J. E.}
}
@inbook {1056,
	title = {Platypezidae, Pipunculidae},
	booktitle = {Diptera of Patagonia and South Chile - Part 6, fascicle 2 Phoridae (supplement), Platypezidae, Pipunculidae, Sphaeroceridae (Borboridae), Ephydridae},
	series = {Diptera of Patagonia and South Chile},
	volume = {6},
	number = {2},
	year = {1931},
	note = {entire fascicle: pp. 43-116 + 1 plate; publisher details: Trustees of the British Museum, the British Museum, B. Quaritch Ltd., Dulau \& Co. Ltd., and the Oxford University Press?Second PDF is just Pipunculidae section},
	pages = {49-61},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	address = {London},
	keywords = {Patagonia, Pipunculidae, South Chile},
	author = {Collin, J. E.}
}
@article {1057,
	title = {The British species of the genus Verrallia (Diptera)},
	journal = {The Entomologist{\textquoteright}s monthly Magazine},
	volume = {67},
	year = {1931},
	pages = {234-236},
	keywords = {Britain, key, Pipunculidae, Verrallia},
	author = {Collin, J. E.}
}
@article {1377,
	title = {Notes on some beneficial Utah Diptera},
	journal = {Rev. App. Ent. Ser. A},
	volume = {19},
	year = {1931},
	pages = {629},
	keywords = {beneficial, Diptera, Pipunculidae, Pipunculus subvirescens, Utah},
	author = {Knowlton, G. F. and Janes, M. J.}
}
@book {1478,
	title = {6000 illustrated Insects of Japan-Empire},
	year = {1931},
	pages = {497},
	publisher = {Toukou Shoin},
	organization = {Toukou Shoin},
	address = {Tokyo},
	keywords = {insects, Japan, Pipunculidae},
	author = {Matsumura, S.}
}
@article {1601,
	title = {Insektfaunan inom Abisko Nationalpark. III. 6. Flugor - Diptera brachycera},
	journal = {K. Svenska Vetenskapsakademiens Skrifter I Naturskydds{\"a}renden},
	volume = {18},
	year = {1931},
	note = {page 12 relevant},
	pages = {1-32},
	keywords = {Abisko National Park, checklist, Palaearctic, Pipunculidae},
	author = {Ringdahl, O.}
}
@book {1746,
	title = {Handbook of the insects and other invertebrates of Hawaiian sugar cane fields},
	year = {1931},
	pages = {400},
	publisher = {Experiment Station of the Hawaiian Sugar Planters{\textquoteright} Association},
	organization = {Experiment Station of the Hawaiian Sugar Planters{\textquoteright} Association},
	address = {Honolulu, Hawaii},
	abstract = {pp. 120-127, 282-285, 368-375 relevant},
	keywords = {handbook, hawaii, insects, Pipunculidae, sugar cane},
	author = {Williams, Francis X.},
	editor = {Williams, Francis X.}
}
