- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2007
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2011
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2011
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2007
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2011
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2007
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2007
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2008
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2007
- Author: Judith A. Beecher Judith A. Penna Marvin L. Bittinger
- Language: English
- Year: 2007