Smith, Patricia L.

Instructional design by: Ragan, Tillman J.; Smith, Patricia L. (Language materials, printed)

A primer for sampling solids, liquids, and gases = based on the seven sampling errors of Pierre Gy / by: Smith, Patricia L. (Language materials, printed)

Instructional design / by: Ragan, Tillman J.; Smith, Patricia L. (Language materials, printed)