Gentleman crossing Main Street, Ann Arbor, Mich.

Cropped version of original. Glass negative [ng. 31]; source: Harold Arndt

Crossing street in front of Neuhoff Drug Co.

McNichols at Greenlawn

Cow Crossing Bridge

Saline Valley Farms was an experiment in cooperative farming and living begun in 1932 by Harold S. Gray.

A compilation of the laws of the forty-eight States relating to the protection of the public at points where railroads intersect highways at grade, including grade crossing elimination acts--Supplement.

Mode of access: Internet.

Motorists' requirements for active grade crossing warning devices /

Mode of access: Internet.

Diode laser treatment of pre-threshold and threshold retinopathy of prematurity

Purpose: Retinopathy of prematurity (ROP) is a sight-threatening condition of premature infants. This study aimed to investigate the efficacy of diode laser photocoagulation in the treatment of pre-threshold and threshold ROP. Methods: A retrospective review was conducted of patients who underwent diode laser treatment for ROP by one author (GAG) from 1992 to 2000. During this time, 2137 babies