Phenotypes of juvenile offspring of a mixed pair consisting of a male House sparrow and a female Tree Sparrow Passer spp.

Cordero, P. J. (1990). Phenotypes of juvenile offspring of a mixed pair consisting of a male House sparrow and a female Tree Sparrow Passer spp. Ornis Fennica, 67(2), 52–56. https://ornisfennica.journal.fi/article/view/133300