Asp, C. W. (1972). The effectiveness of low-frequency amplification and filtered-speech testing for Preschool Deaf Children: The effectiveness of low-frequency amplification and filtered-speech testing for Preschool Deaf Children. Knoxville: The University of Tennessee.
Chicago stil citiranjaAsp, Carl W. The effectiveness of low-frequency amplification and filtered-speech testing for Preschool Deaf Children: The effectiveness of low-frequency amplification and filtered-speech testing for Preschool Deaf Children. Knoxville: The University of Tennessee, 1972.
MLA stil citiranjaAsp, Carl W. The effectiveness of low-frequency amplification and filtered-speech testing for Preschool Deaf Children: The effectiveness of low-frequency amplification and filtered-speech testing for Preschool Deaf Children. Knoxville: The University of Tennessee, 1972.