Text for study of subgroup lattices of finite abelian groups. I want to study the subgroup lattice of a finite abelian group. I have found a text on the subject: Subgroup Lattices of Groups by Roland Schmidt, de Gruyter 1994. This book is about subgroups of any group, not just finite abelian groups.
Is this text a good introduction to the subject? Are there other more accessible texts or lecture notes on the subject? Is it advisable to study a text on lattice theory first, or should I pick up the poset and lattice basics from the proposed text?
Any info regarding introductory texts / notes on the subgroup lattice of a finite abelian group might help.

Subgroup lattices of finite abelian groups have been studied from various points of view, see the following reference:
Vogt, Frank : Subgroup lattices of finite Abelian groups: Structure and cardinality.
In: Lattice theory and its applications. Hrsg.: K.A. Baker, R. Wille. S. 241-259. Heldermann , Berlin .
[Buchkapitel], (1995) 
