TY  - RPRT
TI  - Test and evaluation of baby walkers and walker-jumpers 
AU  - Chwirut, Daniel J
PY  - 1974
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 74-434
DO  - 10.6028/NBS.IR.74-434
ER  -