Glass plate negatives: parasites and cocoons.

• SCA32-GA18-16-1168
• File
• [19--]

Part of John D. Detwiler fonds.

Detwiler, John D.

Glass plate positives : slides for projection of scientific drawings.

• SCA32-GA18-16-1169
• File
• [19--]

Part of John D. Detwiler fonds.

Detwiler, John D.

Prepared microsope slides: salmon scales.

• SCA32-GA18-16-1167
• File
• [19--]

Part of John D. Detwiler fonds.

Detwiler, John D.