Ryer, Elmer Le Roy, 1880–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- Open Library: OL2357449A
- pdbooks.info ID: 32271
Elmer Le Roy Ryer Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
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| Ophthalmometry: a practical text-book for the practitioner and advanced student in optometry | 1925 | Author | |  | |  | | 
| |
| Optometric procedure, basic and supplementary | 1941 | Author | | | | | |
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