Achillies Kallos provides his insight to acquiring Muscular Bulk.Source: Muscular Development (Issue Nov 1973) Page 28 (Muscular Development Issue Nov 1973) Page 29 (Muscular Development Issue Nov 1973) Page 46 (Muscular Development Issue Nov 1973) Page 47 (Muscular Development Issue Nov 1973) Page 48 (Muscular Development Issue Nov 1973)