TY  - BOOK
AU  - Echon, Nelia P. 
TI  - Jump rope: excellent cardio-respiratory endurance exercise (care) 
SN  - 2094-8042
U1  - DPer 370.105 M72 June 2010-Mar 2011 v. 59 n. 1-10 
PY  - 2010///-2011
CY  - Philippines
PB  - In The Grade School, Inc.
KW  - Physical fitness
ER  -