Durand Manterola, Ramos Lara and Cordero 2011, Interpretation of the observations made in 1883 in Zacatecas (Mexico): a fragmented comet that nearly hits the Earth, arXiv:1110.2798
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This book or paper is argued against by
Optics: a 16 cm telescope cannot hold anything farther than about 23-30 km in sharper focus than the Sun; for the Sun to look blurred on Bonilla's photo, the body was within about 0.6-4 km focus rules out 538-8,062 km
This book or paper is where we read about
What were the 447 dark bodies José Bonilla saw crossing the Sun at Zacatecas on 12-13 August 1883?