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Bethune, C. J. 1874: [Crotch, G. R.] The Canadian Entomologist, London 6, B15 10219, pp. 160
Edwards, H. 1874: [Crotch, G. R.] Proceedings of the California Academy of Natural Sciences, San Francisco 5, B15: 10275, pp. 332-334
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[Marseul, S. A. de] 1874: [Crotch, G. R.] L'Abeille, Nouvelles et faits divers, Paris (No. 47), S. CLXXXIX-CXCI, B15: 10077
Matthews, J. R. 1974: [Crotch, G. R.] Psyche, Cambridge/Mass. 81 (1), B15: 10002, pp. 7-8, + Schr.verz.
Musgrave, A. 1932: Bibliography of Australian Entomology 1775 - 1930. Sydney, B15: 2154, pp. 58
Newman, E. 1874: [Crotch, G. R.] The Entomologist, Dorking 7, B15 10035, pp. 236-240, + Schr.verz.
Osborn, H. 1952: A Brief History of Entomology Including Time of Demosthenes and Aristotle to Modern Times with over Five Hundred Portraits. Columbus, Ohio, The Spahr & Glenn Company, 1-303 S., B15: 6024a, pp. 187, Geburtsjahr 1842
Provancher 1874: [Crotch, G. R.] Le Naturaliste Canadien, Quebec 6, B15 10220, pp. 160, 269
Saunders, S. S. 1874: [Crotch, G. R.] (The) Proceedings of the Entomological Society of London for the Year ..., 1874, B15 10001, pp. XXXVI
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Smart, J.; Wager, B. 1977: George Robert Crotch, 1842–1874: a bibliography with a biographical note Journal of the Society for the Bibliography of Natural History, London 8 (3), S. 244-248, B15: 10991, pp. 244-248