AN EASILY CONSTRUCTED RAT LEVER.
Explore the source record for details and available documents.
Equipment and Supplies↗
Biomedical subjects
W F CROWDER
Publications and source records attributed to W F CROWDER.
SIMPLE MOTOR-DRIVEN DEVICES FOR FEEDING AND WATERING ANIMALS.
Explore the source record for details and available documents.
Animals↗
A COMPACT, EASILY CONSTRUCTED WATER DIPPER FOR RATS.
Explore the source record for details and available documents.
Equipment and Supplies↗
AN INEXPENSIVE, RETRACTING RAT LEVER.
Explore the source record for details and available documents.
Equipment and Supplies↗