Engelmann, G., Shaw, H., Trelease, W., & Gray, A. (1887). The botanical works of the late George Engelmann: Collected for Henry Shaw. J. Wilson.

Engelmann, George, Henry Shaw, William Trelease, and Asa Gray. The Botanical Works of the Late George Engelmann: Collected for Henry Shaw. Cambridge, Mass.: J. Wilson, 1887.

Engelmann, George, et al. The Botanical Works of the Late George Engelmann: Collected for Henry Shaw. J. Wilson, 1887.