Borun, M. (1983). Planets and pulleys: Studies of class visits to science museums. Franklin Institute ; Copies may be purchased through the Association of Science-Technology Centers.

Borun, Minda. Planets and Pulleys: Studies of Class Visits to Science Museums. Philadelphia : Washington, D.C.: Franklin Institute ; Copies may be purchased through the Association of Science-Technology Centers, 1983.

Borun, Minda. Planets and Pulleys: Studies of Class Visits to Science Museums. Franklin Institute ; Copies may be purchased through the Association of Science-Technology Centers, 1983.