Estimation of gene frequencies from mother-child combinations of ABO blood groups by the maximum likelihood method                                                 317
A.K. Roy Choudhury 

Observations on electrocardiographic changes in progressive                                          321
muscular dystrophy
Lala S.N. Prasad, K.P. Sinha and M. Rahman 

A field study of illnesses during pregnancy, their management and prenatal care in Punjab villages     330
John E. Gordon , Helen Gideon and John B. Wyon 

Hereditary multiple exostoses (ecchondrosis ossificans): 17 cases in 7 generations                             336
N.L. Sharma, R.N. Singh and J.S. Anand 

CASE RECORDS

Agenesis of lung                                          342
V.K. Gandhi, M.V. Dudhia and R.J. Shah 

Polyarteritis nodosa: Report of a case                                     345
O.P. Thaman, Harbans Lal and S.S. Manchanda 

INDIAN ACADEMY OF PEDIATRICS                                           351

CURRENT LITERATURE                                            353